HBase
  1. HBase
  2. HBASE-4857

Recursive loop on KeeperException in AuthenticationTokenSecretManager/ZKLeaderManager

    Details

    • Type: Bug Bug
    • Status: Resolved
    • Priority: Critical Critical
    • Resolution: Fixed
    • Affects Version/s: 0.92.0, 0.94.0
    • Fix Version/s: 0.92.0
    • Component/s: security
    • Labels:
      None
    • Hadoop Flags:
      Reviewed

      Description

      Looking through stack traces for TestMasterFailover, I see a case where the leader AuthenticationTokenSecretManager can get into a recursive loop when a KeeperException is encountered:

      Thread-1-EventThread" daemon prio=10 tid=0x00007f9fb47b2800 nid=0x77f6 waiting on condition [0x00007f9fab376000]
         java.lang.Thread.State: TIMED_WAITING (sleeping)
              at java.lang.Thread.sleep(Native Method)
              at java.lang.Thread.sleep(Thread.java:302)
              at java.util.concurrent.TimeUnit.sleep(TimeUnit.java:328)
              at org.apache.hadoop.hbase.util.RetryCounter.sleepUntilNextRetry(RetryCounter.java:55)
              at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.exists(RecoverableZooKeeper.java:206)
              at org.apache.hadoop.hbase.zookeeper.ZKUtil.createAndFailSilent(ZKUtil.java:891)
              at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.createBaseZNodes(ZooKeeperWatcher.java:161)
              at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.<init>(ZooKeeperWatcher.java:154)
              at org.apache.hadoop.hbase.master.HMaster.tryRecoveringExpiredZKSession(HMaster.java:1397)
              at org.apache.hadoop.hbase.master.HMaster.abortNow(HMaster.java:1435)
              at org.apache.hadoop.hbase.master.HMaster.abort(HMaster.java:1374)
              at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.abort(ZooKeeperWatcher.java:450)
              at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:166)
              at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
              at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
              at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
              at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
              at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
              at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
              at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
              at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:286)
              at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
              at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
      

      The KeeperException causes ZKLeaderManager to call AuthenticationTokenSecretManager$LeaderElector.stop(), which calls ZKLeaderManager.stepDownAsLeader(), which will encounter another KeeperException, and so on...

      1. HBASE-4857.patch
        0.7 kB
        Gary Helmling

        Activity

        Hide
        Hudson added a comment -

        Integrated in HBase-0.92 #163 (See https://builds.apache.org/job/HBase-0.92/163/)
        HBASE-4857 Recursive loop on KeeperException in AuthenticationTokenSecretManager

        garyh :
        Files :

        • /hbase/branches/0.92/CHANGES.txt
        • /hbase/branches/0.92/security/src/main/java/org/apache/hadoop/hbase/security/token/AuthenticationTokenSecretManager.java
        Show
        Hudson added a comment - Integrated in HBase-0.92 #163 (See https://builds.apache.org/job/HBase-0.92/163/ ) HBASE-4857 Recursive loop on KeeperException in AuthenticationTokenSecretManager garyh : Files : /hbase/branches/0.92/CHANGES.txt /hbase/branches/0.92/security/src/main/java/org/apache/hadoop/hbase/security/token/AuthenticationTokenSecretManager.java
        Hide
        Hudson added a comment -

        Integrated in HBase-TRUNK-security #7 (See https://builds.apache.org/job/HBase-TRUNK-security/7/)
        HBASE-4857 Recursive loop on KeeperException in AuthenticationTokenSecretManager

        garyh :
        Files :

        • /hbase/trunk/CHANGES.txt
        • /hbase/trunk/security/src/main/java/org/apache/hadoop/hbase/security/token/AuthenticationTokenSecretManager.java
        Show
        Hudson added a comment - Integrated in HBase-TRUNK-security #7 (See https://builds.apache.org/job/HBase-TRUNK-security/7/ ) HBASE-4857 Recursive loop on KeeperException in AuthenticationTokenSecretManager garyh : Files : /hbase/trunk/CHANGES.txt /hbase/trunk/security/src/main/java/org/apache/hadoop/hbase/security/token/AuthenticationTokenSecretManager.java
        Hide
        Hudson added a comment -

        Integrated in HBase-TRUNK #2476 (See https://builds.apache.org/job/HBase-TRUNK/2476/)
        HBASE-4857 Recursive loop on KeeperException in AuthenticationTokenSecretManager

        garyh :
        Files :

        • /hbase/trunk/CHANGES.txt
        • /hbase/trunk/security/src/main/java/org/apache/hadoop/hbase/security/token/AuthenticationTokenSecretManager.java
        Show
        Hudson added a comment - Integrated in HBase-TRUNK #2476 (See https://builds.apache.org/job/HBase-TRUNK/2476/ ) HBASE-4857 Recursive loop on KeeperException in AuthenticationTokenSecretManager garyh : Files : /hbase/trunk/CHANGES.txt /hbase/trunk/security/src/main/java/org/apache/hadoop/hbase/security/token/AuthenticationTokenSecretManager.java
        Hide
        Hudson added a comment -

        Integrated in HBase-0.92-security #10 (See https://builds.apache.org/job/HBase-0.92-security/10/)
        HBASE-4857 Recursive loop on KeeperException in AuthenticationTokenSecretManager

        garyh :
        Files :

        • /hbase/branches/0.92/CHANGES.txt
        • /hbase/branches/0.92/security/src/main/java/org/apache/hadoop/hbase/security/token/AuthenticationTokenSecretManager.java
        Show
        Hudson added a comment - Integrated in HBase-0.92-security #10 (See https://builds.apache.org/job/HBase-0.92-security/10/ ) HBASE-4857 Recursive loop on KeeperException in AuthenticationTokenSecretManager garyh : Files : /hbase/branches/0.92/CHANGES.txt /hbase/branches/0.92/security/src/main/java/org/apache/hadoop/hbase/security/token/AuthenticationTokenSecretManager.java
        Hide
        Gary Helmling added a comment -

        Committed to 0.92 branch and trunk.

        Show
        Gary Helmling added a comment - Committed to 0.92 branch and trunk.
        Hide
        Gary Helmling added a comment -

        The TestMasterObserver failure from hadoopqa is odd, but doesn't seem to be caused by this patch. The TestAdmin failure is from exhausted file handles:

        Caused by: java.io.IOException: Too many open files
        	at sun.nio.ch.IOUtil.initPipe(Native Method)
        	at sun.nio.ch.EPollSelectorImpl.<init>(EPollSelectorImpl.java:49)
        	at sun.nio.ch.EPollSelectorProvider.openSelector(EPollSelectorProvider.java:18)
        	at java.nio.channels.Selector.open(Selector.java:209)
        	at org.apache.zookeeper.ClientCnxnSocketNIO.<init>(ClientCnxnSocketNIO.java:42)
        	at sun.reflect.GeneratedConstructorAccessor41.newInstance(Unknown Source)
        	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
        	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
        	at java.lang.Class.newInstance0(Class.java:355)
        	at java.lang.Class.newInstance(Class.java:308)
        	at org.apache.zookeeper.ZooKeeper.getClientCnxnSocket(ZooKeeper.java:1737)
        	... 55 more
        

        Going to go ahead with commit.

        Show
        Gary Helmling added a comment - The TestMasterObserver failure from hadoopqa is odd, but doesn't seem to be caused by this patch. The TestAdmin failure is from exhausted file handles: Caused by: java.io.IOException: Too many open files at sun.nio.ch.IOUtil.initPipe(Native Method) at sun.nio.ch.EPollSelectorImpl.<init>(EPollSelectorImpl.java:49) at sun.nio.ch.EPollSelectorProvider.openSelector(EPollSelectorProvider.java:18) at java.nio.channels.Selector.open(Selector.java:209) at org.apache.zookeeper.ClientCnxnSocketNIO.<init>(ClientCnxnSocketNIO.java:42) at sun.reflect.GeneratedConstructorAccessor41.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at java.lang.Class.newInstance0(Class.java:355) at java.lang.Class.newInstance(Class.java:308) at org.apache.zookeeper.ZooKeeper.getClientCnxnSocket(ZooKeeper.java:1737) ... 55 more Going to go ahead with commit.
        Hide
        Andrew Purtell added a comment -

        Nice catch. +1 on commit and raise to Critical.

        Show
        Andrew Purtell added a comment - Nice catch. +1 on commit and raise to Critical.
        Hide
        Hadoop QA added a comment -

        -1 overall. Here are the results of testing the latest attachment
        http://issues.apache.org/jira/secure/attachment/12504898/HBASE-4857.patch
        against trunk revision .

        +1 @author. The patch does not contain any @author tags.

        -1 tests included. The patch doesn't appear to include any new or modified tests.
        Please justify why no new tests are needed for this patch.
        Also please list what manual steps were performed to verify this patch.

        -1 javadoc. The javadoc tool appears to have generated -162 warning messages.

        +1 javac. The applied patch does not increase the total number of javac compiler warnings.

        -1 findbugs. The patch appears to introduce 66 new Findbugs (version 1.3.9) warnings.

        +1 release audit. The applied patch does not increase the total number of release audit warnings.

        -1 core tests. The patch failed these unit tests:
        org.apache.hadoop.hbase.coprocessor.TestMasterObserver
        org.apache.hadoop.hbase.client.TestAdmin
        org.apache.hadoop.hbase.client.TestInstantSchemaChange

        Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/350//testReport/
        Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/350//artifact/trunk/patchprocess/newPatchFindbugsWarnings.html
        Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/350//console

        This message is automatically generated.

        Show
        Hadoop QA added a comment - -1 overall. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12504898/HBASE-4857.patch against trunk revision . +1 @author. The patch does not contain any @author tags. -1 tests included. The patch doesn't appear to include any new or modified tests. Please justify why no new tests are needed for this patch. Also please list what manual steps were performed to verify this patch. -1 javadoc. The javadoc tool appears to have generated -162 warning messages. +1 javac. The applied patch does not increase the total number of javac compiler warnings. -1 findbugs. The patch appears to introduce 66 new Findbugs (version 1.3.9) warnings. +1 release audit. The applied patch does not increase the total number of release audit warnings. -1 core tests. The patch failed these unit tests: org.apache.hadoop.hbase.coprocessor.TestMasterObserver org.apache.hadoop.hbase.client.TestAdmin org.apache.hadoop.hbase.client.TestInstantSchemaChange Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/350//testReport/ Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/350//artifact/trunk/patchprocess/newPatchFindbugsWarnings.html Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/350//console This message is automatically generated.
        Hide
        Ted Yu added a comment -

        Since zookeeper 3.4 is released, should we change the following in pom.xml as well ?

            <zookeeper.version>3.4.0-SNAPSHOT</zookeeper.version>
        
        Show
        Ted Yu added a comment - Since zookeeper 3.4 is released, should we change the following in pom.xml as well ? <zookeeper.version>3.4.0-SNAPSHOT</zookeeper.version>
        Hide
        ramkrishna.s.vasudevan added a comment -

        +1

        Show
        ramkrishna.s.vasudevan added a comment - +1
        Hide
        Ted Yu added a comment -

        This issue was also manifested in the test output of TestDistributedLogSplitting,
        https://builds.apache.org/view/G-L/view/HBase/job/HBase-0.92-security/9/artifact/trunk/target/surefire-reports/org.apache.hadoop.hbase.master.TestDistributedLogSplitting-output.txt:

        2011-11-23 15:40:42,250 WARN  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZKUtil(470): regionserver:38035-0x133d1159c270005 Unable to get data of znode /hbase/tokenauth/keymaster
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.s
        top(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,251 ERROR [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZooKeeperWatcher(403): regionserver:38035-0x133d1159c270005 Received unexpected KeeperException, re-throwing exception
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$L
        eaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,252 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1526): ABORTING region server minerva.apache.org,38035,1322062814712: Unhandled zookeeper exception removing leader node
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationT
        okenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,252 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1535): RegionServer abort: loaded coprocessors are: []
        
        2011-11-23 15:40:42,253 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1538): Dump of metrics: requestsPerSecond=0, numberOfOnlineRegions=1, numberOfStores=1, numberOfStorefiles=0, storefileIndexSizeMB=0, rootIndexSizeKB=0, totalStaticIndexSizeKB=0, totalStaticBloomSizeKB=0, memstoreSizeMB=0, readRequestsCount=102, writeRequestsCount=100, compactionQueueSize=0, flushQueueSize=0, usedHeapMB=229, maxHeapMB=1244, blockCacheSizeMB=1.17, blockCacheFreeMB=247.73, blockCacheCount=1, blockCacheHitCount=48, blockCacheMissCount=14, blockCacheEvictedCount=13, blockCacheHitRatio=77%, blockCacheHitCachingRatio=77%, hdfsBlocksLocalityIndex=0
        
        2011-11-23 15:40:42,253 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1455): STOPPED: Unhandled zookeeper exception removing leader node
        
        2011-11-23 15:40:42,254 WARN  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZKUtil(470): regionserver:38035-0x133d1159c270005 Unable to get data of znode /hbase/tokenauth/keymaster
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.s
        top(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,255 ERROR [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZooKeeperWatcher(403): regionserver:38035-0x133d1159c270005 Received unexpected KeeperException, re-throwing exception
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$L
        eaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,256 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1526): ABORTING region server minerva.apache.org,38035,1322062814712: Unhandled zookeeper exception removing leader node
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationT
        okenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,256 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1535): RegionServer abort: loaded coprocessors are: []
        
        2011-11-23 15:40:42,257 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1538): Dump of metrics: requestsPerSecond=0, numberOfOnlineRegions=1, numberOfStores=1, numberOfStorefiles=0, storefileIndexSizeMB=0, rootIndexSizeKB=0, totalStaticIndexSizeKB=0, totalStaticBloomSizeKB=0, memstoreSizeMB=0, readRequestsCount=102, writeRequestsCount=100, compactionQueueSize=0, flushQueueSize=0, usedHeapMB=230, maxHeapMB=1244, blockCacheSizeMB=1.17, blockCacheFreeMB=247.73, blockCacheCount=1, blockCacheHitCount=48, blockCacheMissCount=14, blockCacheEvictedCount=13, blockCacheHitRatio=77%, blockCacheHitCachingRatio=77%, hdfsBlocksLocalityIndex=0
        
        2011-11-23 15:40:42,257 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1455): STOPPED: Unhandled zookeeper exception removing leader node
        
        2011-11-23 15:40:42,258 WARN  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZKUtil(470): regionserver:38035-0x133d1159c270005 Unable to get data of znode /hbase/tokenauth/keymaster
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.s
        top(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,259 ERROR [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZooKeeperWatcher(403): regionserver:38035-0x133d1159c270005 Received unexpected KeeperException, re-throwing exception
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$L
        eaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,260 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1526): ABORTING region server minerva.apache.org,38035,1322062814712: Unhandled zookeeper exception removing leader node
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationT
        okenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,260 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1535): RegionServer abort: loaded coprocessors are: []
        
        2011-11-23 15:40:42,261 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1538): Dump of metrics: requestsPerSecond=0, numberOfOnlineRegions=1, numberOfStores=1, numberOfStorefiles=0, storefileIndexSizeMB=0, rootIndexSizeKB=0, totalStaticIndexSizeKB=0, totalStaticBloomSizeKB=0, memstoreSizeMB=0, readRequestsCount=102, writeRequestsCount=100, compactionQueueSize=0, flushQueueSize=0, usedHeapMB=232, maxHeapMB=1244, blockCacheSizeMB=1.17, blockCacheFreeMB=247.73, blockCacheCount=1, blockCacheHitCount=48, blockCacheMissCount=14, blockCacheEvictedCount=13, blockCacheHitRatio=77%, blockCacheHitCachingRatio=77%, hdfsBlocksLocalityIndex=0
        
        2011-11-23 15:40:42,261 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1455): STOPPED: Unhandled zookeeper exception removing leader node
        
        2011-11-23 15:40:42,262 WARN  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZKUtil(470): regionserver:38035-0x133d1159c270005 Unable to get data of znode /hbase/tokenauth/keymaster
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.s
        top(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,263 ERROR [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZooKeeperWatcher(403): regionserver:38035-0x133d1159c270005 Received unexpected KeeperException, re-throwing exception
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$L
        eaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,264 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1526): ABORTING region server minerva.apache.org,38035,1322062814712: Unhandled zookeeper exception removing leader node
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationT
        okenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,264 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1535): RegionServer abort: loaded coprocessors are: []
        
        2011-11-23 15:40:42,265 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1538): Dump of metrics: requestsPerSecond=0, numberOfOnlineRegions=1, numberOfStores=1, numberOfStorefiles=0, storefileIndexSizeMB=0, rootIndexSizeKB=0, totalStaticIndexSizeKB=0, totalStaticBloomSizeKB=0, memstoreSizeMB=0, readRequestsCount=102, writeRequestsCount=100, compactionQueueSize=0, flushQueueSize=0, usedHeapMB=234, maxHeapMB=1244, blockCacheSizeMB=1.17, blockCacheFreeMB=247.73, blockCacheCount=1, blockCacheHitCount=48, blockCacheMissCount=14, blockCacheEvictedCount=13, blockCacheHitRatio=77%, blockCacheHitCachingRatio=77%, hdfsBlocksLocalityIndex=0
        
        2011-11-23 15:40:42,266 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1455): STOPPED: Unhandled zookeeper exception removing leader node
        
        2011-11-23 15:40:42,266 WARN  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZKUtil(470): regionserver:38035-0x133d1159c270005 Unable to get data of znode /hbase/tokenauth/keymaster
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.s
        top(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,267 ERROR [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZooKeeperWatcher(403): regionserver:38035-0x133d1159c270005 Received unexpected KeeperException, re-throwing exception
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$L
        eaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,268 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1526): ABORTING region server minerva.apache.org,38035,1322062814712: Unhandled zookeeper exception removing leader node
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationT
        okenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,269 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1535): RegionServer abort: loaded coprocessors are: []
        
        2011-11-23 15:40:42,269 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1538): Dump of metrics: requestsPerSecond=0, numberOfOnlineRegions=1, numberOfStores=1, numberOfStorefiles=0, storefileIndexSizeMB=0, rootIndexSizeKB=0, totalStaticIndexSizeKB=0, totalStaticBloomSizeKB=0, memstoreSizeMB=0, readRequestsCount=102, writeRequestsCount=100, compactionQueueSize=0, flushQueueSize=0, usedHeapMB=236, maxHeapMB=1244, blockCacheSizeMB=1.17, blockCacheFreeMB=247.73, blockCacheCount=1, blockCacheHitCount=48, blockCacheMissCount=14, blockCacheEvictedCount=13, blockCacheHitRatio=77%, blockCacheHitCachingRatio=77%, hdfsBlocksLocalityIndex=0
        
        2011-11-23 15:40:42,270 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1455): STOPPED: Unhandled zookeeper exception removing leader node
        
        2011-11-23 15:40:42,270 WARN  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZKUtil(470): regionserver:38035-0x133d1159c270005 Unable to get data of znode /hbase/tokenauth/keymaster
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.s
        top(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,271 ERROR [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZooKeeperWatcher(403): regionserver:38035-0x133d1159c270005 Received unexpected KeeperException, re-throwing exception
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$L
        eaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,272 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1526): ABORTING region server minerva.apache.org,38035,1322062814712: Unhandled zookeeper exception removing leader node
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationT
        okenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,273 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1535): RegionServer abort: loaded coprocessors are: []
        
        2011-11-23 15:40:42,274 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1538): Dump of metrics: requestsPerSecond=0, numberOfOnlineRegions=1, numberOfStores=1, numberOfStorefiles=0, storefileIndexSizeMB=0, rootIndexSizeKB=0, totalStaticIndexSizeKB=0, totalStaticBloomSizeKB=0, memstoreSizeMB=0, readRequestsCount=102, writeRequestsCount=100, compactionQueueSize=0, flushQueueSize=0, usedHeapMB=237, maxHeapMB=1244, blockCacheSizeMB=1.17, blockCacheFreeMB=247.73, blockCacheCount=1, blockCacheHitCount=48, blockCacheMissCount=14, blockCacheEvictedCount=13, blockCacheHitRatio=77%, blockCacheHitCachingRatio=77%, hdfsBlocksLocalityIndex=0
        
        2011-11-23 15:40:42,274 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1455): STOPPED: Unhandled zookeeper exception removing leader node
        
        2011-11-23 15:40:42,275 WARN  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZKUtil(470): regionserver:38035-0x133d1159c270005 Unable to get data of znode /hbase/tokenauth/keymaster
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.s
        top(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,276 ERROR [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZooKeeperWatcher(403): regionserver:38035-0x133d1159c270005 Received unexpected KeeperException, re-throwing exception
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$L
        eaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,277 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1526): ABORTING region server minerva.apache.org,38035,1322062814712: Unhandled zookeeper exception removing leader node
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationT
        okenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,277 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1535): RegionServer abort: loaded coprocessors are: []
        
        2011-11-23 15:40:42,278 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1538): Dump of metrics: requestsPerSecond=0, numberOfOnlineRegions=1, numberOfStores=1, numberOfStorefiles=0, storefileIndexSizeMB=0, rootIndexSizeKB=0, totalStaticIndexSizeKB=0, totalStaticBloomSizeKB=0, memstoreSizeMB=0, readRequestsCount=102, writeRequestsCount=100, compactionQueueSize=0, flushQueueSize=0, usedHeapMB=239, maxHeapMB=1244, blockCacheSizeMB=1.17, blockCacheFreeMB=247.73, blockCacheCount=1, blockCacheHitCount=48, blockCacheMissCount=14, blockCacheEvictedCount=13, blockCacheHitRatio=77%, blockCacheHitCachingRatio=77%, hdfsBlocksLocalityIndex=0
        
        2011-11-23 15:40:42,278 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1455): STOPPED: Unhandled zookeeper exception removing leader node
        
        2011-11-23 15:40:42,279 WARN  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZKUtil(470): regionserver:38035-0x133d1159c270005 Unable to get data of znode /hbase/tokenauth/keymaster
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.s
        top(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,280 ERROR [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZooKeeperWatcher(403): regionserver:38035-0x133d1159c270005 Received unexpected KeeperException, re-throwing exception
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$L
        eaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,281 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1526): ABORTING region server minerva.apache.org,38035,1322062814712: Unhandled zookeeper exception removing leader node
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationT
        okenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,282 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1535): RegionServer abort: loaded coprocessors are: []
        
        2011-11-23 15:40:42,282 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1538): Dump of metrics: requestsPerSecond=0, numberOfOnlineRegions=1, numberOfStores=1, numberOfStorefiles=0, storefileIndexSizeMB=0, rootIndexSizeKB=0, totalStaticIndexSizeKB=0, totalStaticBloomSizeKB=0, memstoreSizeMB=0, readRequestsCount=102, writeRequestsCount=100, compactionQueueSize=0, flushQueueSize=0, usedHeapMB=241, maxHeapMB=1244, blockCacheSizeMB=1.17, blockCacheFreeMB=247.73, blockCacheCount=1, blockCacheHitCount=48, blockCacheMissCount=14, blockCacheEvictedCount=13, blockCacheHitRatio=77%, blockCacheHitCachingRatio=77%, hdfsBlocksLocalityIndex=0
        
        2011-11-23 15:40:42,283 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1455): STOPPED: Unhandled zookeeper exception removing leader node
        
        2011-11-23 15:40:42,283 WARN  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZKUtil(470): regionserver:38035-0x133d1159c270005 Unable to get data of znode /hbase/tokenauth/keymaster
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.s
        top(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,284 ERROR [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZooKeeperWatcher(403): regionserver:38035-0x133d1159c270005 Received unexpected KeeperException, re-throwing exception
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$L
        eaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,285 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1526): ABORTING region server minerva.apache.org,38035,1322062814712: Unhandled zookeeper exception removing leader node
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationT
        okenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,286 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1535): RegionServer abort: loaded coprocessors are: []
        
        2011-11-23 15:40:42,286 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1538): Dump of metrics: requestsPerSecond=0, numberOfOnlineRegions=1, numberOfStores=1, numberOfStorefiles=0, storefileIndexSizeMB=0, rootIndexSizeKB=0, totalStaticIndexSizeKB=0, totalStaticBloomSizeKB=0, memstoreSizeMB=0, readRequestsCount=102, writeRequestsCount=100, compactionQueueSize=0, flushQueueSize=0, usedHeapMB=243, maxHeapMB=1244, blockCacheSizeMB=1.17, blockCacheFreeMB=247.73, blockCacheCount=1, blockCacheHitCount=48, blockCacheMissCount=14, blockCacheEvictedCount=13, blockCacheHitRatio=77%, blockCacheHitCachingRatio=77%, hdfsBlocksLocalityIndex=0
        
        2011-11-23 15:40:42,287 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1455): STOPPED: Unhandled zookeeper exception removing leader node
        
        2011-11-23 15:40:42,287 WARN  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZKUtil(470): regionserver:38035-0x133d1159c270005 Unable to get data of znode /hbase/tokenauth/keymaster
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.s
        top(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,288 ERROR [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZooKeeperWatcher(403): regionserver:38035-0x133d1159c270005 Received unexpected KeeperException, re-throwing exception
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$L
        eaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,289 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1526): ABORTING region server minerva.apache.org,38035,1322062814712: Unhandled zookeeper exception removing leader node
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationT
        okenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,290 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1535): RegionServer abort: loaded coprocessors are: []
        
        2011-11-23 15:40:42,290 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1538): Dump of metrics: requestsPerSecond=0, numberOfOnlineRegions=1, numberOfStores=1, numberOfStorefiles=0, storefileIndexSizeMB=0, rootIndexSizeKB=0, totalStaticIndexSizeKB=0, totalStaticBloomSizeKB=0, memstoreSizeMB=0, readRequestsCount=102, writeRequestsCount=100, compactionQueueSize=0, flushQueueSize=0, usedHeapMB=245, maxHeapMB=1244, blockCacheSizeMB=1.17, blockCacheFreeMB=247.73, blockCacheCount=1, blockCacheHitCount=48, blockCacheMissCount=14, blockCacheEvictedCount=13, blockCacheHitRatio=77%, blockCacheHitCachingRatio=77%, hdfsBlocksLocalityIndex=0
        
        2011-11-23 15:40:42,291 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1455): STOPPED: Unhandled zookeeper exception removing leader node
        
        2011-11-23 15:40:42,291 WARN  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZKUtil(470): regionserver:38035-0x133d1159c270005 Unable to get data of znode /hbase/tokenauth/keymaster
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.s
        top(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,292 ERROR [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZooKeeperWatcher(403): regionserver:38035-0x133d1159c270005 Received unexpected KeeperException, re-throwing exception
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$L
        eaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,293 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1526): ABORTING region server minerva.apache.org,38035,1322062814712: Unhandled zookeeper exception removing leader node
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationT
        okenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,294 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1535): RegionServer abort: loaded coprocessors are: []
        
        2011-11-23 15:40:42,295 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1538): Dump of metrics: requestsPerSecond=0, numberOfOnlineRegions=1, numberOfStores=1, numberOfStorefiles=0, storefileIndexSizeMB=0, rootIndexSizeKB=0, totalStaticIndexSizeKB=0, totalStaticBloomSizeKB=0, memstoreSizeMB=0, readRequestsCount=102, writeRequestsCount=100, compactionQueueSize=0, flushQueueSize=0, usedHeapMB=246, maxHeapMB=1244, blockCacheSizeMB=1.17, blockCacheFreeMB=247.73, blockCacheCount=1, blockCacheHitCount=48, blockCacheMissCount=14, blockCacheEvictedCount=13, blockCacheHitRatio=77%, blockCacheHitCachingRatio=77%, hdfsBlocksLocalityIndex=0
        
        2011-11-23 15:40:42,295 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1455): STOPPED: Unhandled zookeeper exception removing leader node
        
        2011-11-23 15:40:42,296 WARN  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZKUtil(470): regionserver:38035-0x133d1159c270005 Unable to get data of znode /hbase/tokenauth/keymaster
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.s
        top(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,297 ERROR [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZooKeeperWatcher(403): regionserver:38035-0x133d1159c270005 Received unexpected KeeperException, re-throwing exception
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$L
        eaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,298 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1526): ABORTING region server minerva.apache.org,38035,1322062814712: Unhandled zookeeper exception removing leader node
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationT
        okenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,298 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1535): RegionServer abort: loaded coprocessors are: []
        
        2011-11-23 15:40:42,299 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1538): Dump of metrics: requestsPerSecond=0, numberOfOnlineRegions=1, numberOfStores=1, numberOfStorefiles=0, storefileIndexSizeMB=0, rootIndexSizeKB=0, totalStaticIndexSizeKB=0, totalStaticBloomSizeKB=0, memstoreSizeMB=0, readRequestsCount=102, writeRequestsCount=100, compactionQueueSize=0, flushQueueSize=0, usedHeapMB=248, maxHeapMB=1244, blockCacheSizeMB=1.17, blockCacheFreeMB=247.73, blockCacheCount=1, blockCacheHitCount=48, blockCacheMissCount=14, blockCacheEvictedCount=13, blockCacheHitRatio=77%, blockCacheHitCachingRatio=77%, hdfsBlocksLocalityIndex=0
        
        2011-11-23 15:40:42,299 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1455): STOPPED: Unhandled zookeeper exception removing leader node
        
        2011-11-23 15:40:42,300 WARN  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZKUtil(470): regionserver:38035-0x133d1159c270005 Unable to get data of znode /hbase/tokenauth/keymaster
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.s
        top(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,301 ERROR [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZooKeeperWatcher(403): regionserver:38035-0x133d1159c270005 Received unexpected KeeperException, re-throwing exception
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$L
        eaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,302 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1526): ABORTING region server minerva.apache.org,38035,1322062814712: Unhandled zookeeper exception removing leader node
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationT
        okenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,303 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1535): RegionServer abort: loaded coprocessors are: []
        
        2011-11-23 15:40:42,303 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1538): Dump of metrics: requestsPerSecond=0, numberOfOnlineRegions=1, numberOfStores=1, numberOfStorefiles=0, storefileIndexSizeMB=0, rootIndexSizeKB=0, totalStaticIndexSizeKB=0, totalStaticBloomSizeKB=0, memstoreSizeMB=0, readRequestsCount=102, writeRequestsCount=100, compactionQueueSize=0, flushQueueSize=0, usedHeapMB=250, maxHeapMB=1244, blockCacheSizeMB=1.17, blockCacheFreeMB=247.73, blockCacheCount=1, blockCacheHitCount=48, blockCacheMissCount=14, blockCacheEvictedCount=13, blockCacheHitRatio=77%, blockCacheHitCachingRatio=77%, hdfsBlocksLocalityIndex=0
        
        2011-11-23 15:40:42,304 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1455): STOPPED: Unhandled zookeeper exception removing leader node
        
        2011-11-23 15:40:42,304 WARN  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZKUtil(470): regionserver:38035-0x133d1159c270005 Unable to get data of znode /hbase/tokenauth/keymaster
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.s
        top(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,305 ERROR [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZooKeeperWatcher(403): regionserver:38035-0x133d1159c270005 Received unexpected KeeperException, re-throwing exception
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$L
        eaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,306 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1526): ABORTING region server minerva.apache.org,38035,1322062814712: Unhandled zookeeper exception removing leader node
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationT
        okenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,307 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1535): RegionServer abort: loaded coprocessors are: []
        
        2011-11-23 15:40:42,307 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1538): Dump of metrics: requestsPerSecond=0, numberOfOnlineRegions=1, numberOfStores=1, numberOfStorefiles=0, storefileIndexSizeMB=0, rootIndexSizeKB=0, totalStaticIndexSizeKB=0, totalStaticBloomSizeKB=0, memstoreSizeMB=0, readRequestsCount=102, writeRequestsCount=100, compactionQueueSize=0, flushQueueSize=0, usedHeapMB=252, maxHeapMB=1244, blockCacheSizeMB=1.17, blockCacheFreeMB=247.73, blockCacheCount=1, blockCacheHitCount=48, blockCacheMissCount=14, blockCacheEvictedCount=13, blockCacheHitRatio=77%, blockCacheHitCachingRatio=77%, hdfsBlocksLocalityIndex=0
        
        2011-11-23 15:40:42,308 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1455): STOPPED: Unhandled zookeeper exception removing leader node
        
        2011-11-23 15:40:42,308 WARN  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZKUtil(470): regionserver:38035-0x133d1159c270005 Unable to get data of znode /hbase/tokenauth/keymaster
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.s
        top(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,309 ERROR [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZooKeeperWatcher(403): regionserver:38035-0x133d1159c270005 Received unexpected KeeperException, re-throwing exception
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$L
        eaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,328 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1526): ABORTING region server minerva.apache.org,38035,1322062814712: Unhandled zookeeper exception removing leader node
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationT
        okenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,329 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1535): RegionServer abort: loaded coprocessors are: []
        
        2011-11-23 15:40:42,330 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1538): Dump of metrics: requestsPerSecond=0, numberOfOnlineRegions=1, numberOfStores=1, numberOfStorefiles=0, storefileIndexSizeMB=0, rootIndexSizeKB=0, totalStaticIndexSizeKB=0, totalStaticBloomSizeKB=0, memstoreSizeMB=0, readRequestsCount=102, writeRequestsCount=100, compactionQueueSize=0, flushQueueSize=0, usedHeapMB=176, maxHeapMB=1244, blockCacheSizeMB=1.17, blockCacheFreeMB=247.73, blockCacheCount=1, blockCacheHitCount=48, blockCacheMissCount=14, blockCacheEvictedCount=13, blockCacheHitRatio=77%, blockCacheHitCachingRatio=77%, hdfsBlocksLocalityIndex=0
        
        2011-11-23 15:40:42,330 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1455): STOPPED: Unhandled zookeeper exception removing leader node
        
        2011-11-23 15:40:42,331 WARN  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZKUtil(470): regionserver:38035-0x133d1159c270005 Unable to get data of znode /hbase/tokenauth/keymaster
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.s
        top(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,332 ERROR [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZooKeeperWatcher(403): regionserver:38035-0x133d1159c270005 Received unexpected KeeperException, re-throwing exception
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$L
        eaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,333 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1526): ABORTING region server minerva.apache.org,38035,1322062814712: Unhandled zookeeper exception removing leader node
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationT
        okenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,334 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1535): RegionServer abort: loaded coprocessors are: []
        
        2011-11-23 15:40:42,334 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1538): Dump of metrics: requestsPerSecond=0, numberOfOnlineRegions=1, numberOfStores=1, numberOfStorefiles=0, storefileIndexSizeMB=0, rootIndexSizeKB=0, totalStaticIndexSizeKB=0, totalStaticBloomSizeKB=0, memstoreSizeMB=0, readRequestsCount=102, writeRequestsCount=100, compactionQueueSize=0, flushQueueSize=0, usedHeapMB=178, maxHeapMB=1244, blockCacheSizeMB=1.17, blockCacheFreeMB=247.73, blockCacheCount=1, blockCacheHitCount=48, blockCacheMissCount=14, blockCacheEvictedCount=13, blockCacheHitRatio=77%, blockCacheHitCachingRatio=77%, hdfsBlocksLocalityIndex=0
        
        2011-11-23 15:40:42,335 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1455): STOPPED: Unhandled zookeeper exception removing leader node
        
        2011-11-23 15:40:42,335 WARN  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZKUtil(470): regionserver:38035-0x133d1159c270005 Unable to get data of znode /hbase/tokenauth/keymaster
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.s
        top(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,336 ERROR [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZooKeeperWatcher(403): regionserver:38035-0x133d1159c270005 Received unexpected KeeperException, re-throwing exception
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$L
        eaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,337 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1526): ABORTING region server minerva.apache.org,38035,1322062814712: Unhandled zookeeper exception removing leader node
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationT
        okenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,338 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1535): RegionServer abort: loaded coprocessors are: []
        
        2011-11-23 15:40:42,338 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1538): Dump of metrics: requestsPerSecond=0, numberOfOnlineRegions=1, numberOfStores=1, numberOfStorefiles=0, storefileIndexSizeMB=0, rootIndexSizeKB=0, totalStaticIndexSizeKB=0, totalStaticBloomSizeKB=0, memstoreSizeMB=0, readRequestsCount=102, writeRequestsCount=100, compactionQueueSize=0, flushQueueSize=0, usedHeapMB=180, maxHeapMB=1244, blockCacheSizeMB=1.17, blockCacheFreeMB=247.73, blockCacheCount=1, blockCacheHitCount=48, blockCacheMissCount=14, blockCacheEvictedCount=13, blockCacheHitRatio=77%, blockCacheHitCachingRatio=77%, hdfsBlocksLocalityIndex=0
        
        2011-11-23 15:40:42,338 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1455): STOPPED: Unhandled zookeeper exception removing leader node
        
        2011-11-23 15:40:42,339 WARN  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZKUtil(470): regionserver:38035-0x133d1159c270005 Unable to get data of znode /hbase/tokenauth/keymaster
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.s
        top(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,340 ERROR [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZooKeeperWatcher(403): regionserver:38035-0x133d1159c270005 Received unexpected KeeperException, re-throwing exception
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$L
        eaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,341 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1526): ABORTING region server minerva.apache.org,38035,1322062814712: Unhandled zookeeper exception removing leader node
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationT
        okenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,342 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1535): RegionServer abort: loaded coprocessors are: []
        
        2011-11-23 15:40:42,342 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1538): Dump of metrics: requestsPerSecond=0, numberOfOnlineRegions=1, numberOfStores=1, numberOfStorefiles=0, storefileIndexSizeMB=0, rootIndexSizeKB=0, totalStaticIndexSizeKB=0, totalStaticBloomSizeKB=0, memstoreSizeMB=0, readRequestsCount=102, writeRequestsCount=100, compactionQueueSize=0, flushQueueSize=0, usedHeapMB=182, maxHeapMB=1244, blockCacheSizeMB=1.17, blockCacheFreeMB=247.73, blockCacheCount=1, blockCacheHitCount=48, blockCacheMissCount=14, blockCacheEvictedCount=13, blockCacheHitRatio=77%, blockCacheHitCachingRatio=77%, hdfsBlocksLocalityIndex=0
        
        2011-11-23 15:40:42,343 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1455): STOPPED: Unhandled zookeeper exception removing leader node
        
        2011-11-23 15:40:42,343 WARN  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZKUtil(470): regionserver:38035-0x133d1159c270005 Unable to get data of znode /hbase/tokenauth/keymaster
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.s
        top(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,344 ERROR [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZooKeeperWatcher(403): regionserver:38035-0x133d1159c270005 Received unexpected KeeperException, re-throwing exception
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$L
        eaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,345 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1526): ABORTING region server minerva.apache.org,38035,1322062814712: Unhandled zookeeper exception removing leader node
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationT
        okenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,346 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1535): RegionServer abort: loaded coprocessors are: []
        
        2011-11-23 15:40:42,346 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1538): Dump of metrics: requestsPerSecond=0, numberOfOnlineRegions=1, numberOfStores=1, numberOfStorefiles=0, storefileIndexSizeMB=0, rootIndexSizeKB=0, totalStaticIndexSizeKB=0, totalStaticBloomSizeKB=0, memstoreSizeMB=0, readRequestsCount=102, writeRequestsCount=100, compactionQueueSize=0, flushQueueSize=0, usedHeapMB=184, maxHeapMB=1244, blockCacheSizeMB=1.17, blockCacheFreeMB=247.73, blockCacheCount=1, blockCacheHitCount=48, blockCacheMissCount=14, blockCacheEvictedCount=13, blockCacheHitRatio=77%, blockCacheHitCachingRatio=77%, hdfsBlocksLocalityIndex=0
        
        2011-11-23 15:40:42,347 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1455): STOPPED: Unhandled zookeeper exception removing leader node
        
        2011-11-23 15:40:42,347 WARN  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZKUtil(470): regionserver:38035-0x133d1159c270005 Unable to get data of znode /hbase/tokenauth/keymaster
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.s
        top(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,349 ERROR [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZooKeeperWatcher(403): regionserver:38035-0x133d1159c270005 Received unexpected KeeperException, re-throwing exception
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$L
        eaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,350 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1526): ABORTING region server minerva.apache.org,38035,1322062814712: Unhandled zookeeper exception removing leader node
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationT
        okenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,350 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1535): RegionServer abort: loaded coprocessors are: []
        
        2011-11-23 15:40:42,351 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1538): Dump of metrics: requestsPerSecond=0, numberOfOnlineRegions=1, numberOfStores=1, numberOfStorefiles=0, storefileIndexSizeMB=0, rootIndexSizeKB=0, totalStaticIndexSizeKB=0, totalStaticBloomSizeKB=0, memstoreSizeMB=0, readRequestsCount=102, writeRequestsCount=100, compactionQueueSize=0, flushQueueSize=0, usedHeapMB=186, maxHeapMB=1244, blockCacheSizeMB=1.17, blockCacheFreeMB=247.73, blockCacheCount=1, blockCacheHitCount=48, blockCacheMissCount=14, blockCacheEvictedCount=13, blockCacheHitRatio=77%, blockCacheHitCachingRatio=77%, hdfsBlocksLocalityIndex=0
        
        2011-11-23 15:40:42,351 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1455): STOPPED: Unhandled zookeeper exception removing leader node
        
        2011-11-23 15:40:42,352 WARN  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZKUtil(470): regionserver:38035-0x133d1159c270005 Unable to get data of znode /hbase/tokenauth/keymaster
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.s
        top(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,353 ERROR [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZooKeeperWatcher(403): regionserver:38035-0x133d1159c270005 Received unexpected KeeperException, re-throwing exception
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$L
        eaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,354 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1526): ABORTING region server minerva.apache.org,38035,1322062814712: Unhandled zookeeper exception removing leader node
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationT
        okenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,354 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1535): RegionServer abort: loaded coprocessors are: []
        
        2011-11-23 15:40:42,355 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1538): Dump of metrics: requestsPerSecond=0, numberOfOnlineRegions=1, numberOfStores=1, numberOfStorefiles=0, storefileIndexSizeMB=0, rootIndexSizeKB=0, totalStaticIndexSizeKB=0, totalStaticBloomSizeKB=0, memstoreSizeMB=0, readRequestsCount=102, writeRequestsCount=100, compactionQueueSize=0, flushQueueSize=0, usedHeapMB=188, maxHeapMB=1244, blockCacheSizeMB=1.17, blockCacheFreeMB=247.73, blockCacheCount=1, blockCacheHitCount=48, blockCacheMissCount=14, blockCacheEvictedCount=13, blockCacheHitRatio=77%, blockCacheHitCachingRatio=77%, hdfsBlocksLocalityIndex=0
        
        2011-11-23 15:40:42,355 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1455): STOPPED: Unhandled zookeeper exception removing leader node
        
        2011-11-23 15:40:42,356 WARN  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZKUtil(470): regionserver:38035-0x133d1159c270005 Unable to get data of znode /hbase/tokenauth/keymaster
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.s
        top(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,357 ERROR [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZooKeeperWatcher(403): regionserver:38035-0x133d1159c270005 Received unexpected KeeperException, re-throwing exception
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$L
        eaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,358 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1526): ABORTING region server minerva.apache.org,38035,1322062814712: Unhandled zookeeper exception removing leader node
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationT
        okenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,359 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1535): RegionServer abort: loaded coprocessors are: []
        
        2011-11-23 15:40:42,359 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1538): Dump of metrics: requestsPerSecond=0, numberOfOnlineRegions=1, numberOfStores=1, numberOfStorefiles=0, storefileIndexSizeMB=0, rootIndexSizeKB=0, totalStaticIndexSizeKB=0, totalStaticBloomSizeKB=0, memstoreSizeMB=0, readRequestsCount=102, writeRequestsCount=100, compactionQueueSize=0, flushQueueSize=0, usedHeapMB=190, maxHeapMB=1244, blockCacheSizeMB=1.17, blockCacheFreeMB=247.73, blockCacheCount=1, blockCacheHitCount=48, blockCacheMissCount=14, blockCacheEvictedCount=13, blockCacheHitRatio=77%, blockCacheHitCachingRatio=77%, hdfsBlocksLocalityIndex=0
        
        2011-11-23 15:40:42,360 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1455): STOPPED: Unhandled zookeeper exception removing leader node
        
        2011-11-23 15:40:42,360 WARN  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZKUtil(470): regionserver:38035-0x133d1159c270005 Unable to get data of znode /hbase/tokenauth/keymaster
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.s
        top(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,361 ERROR [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZooKeeperWatcher(403): regionserver:38035-0x133d1159c270005 Received unexpected KeeperException, re-throwing exception
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$L
        eaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,362 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1526): ABORTING region server minerva.apache.org,38035,1322062814712: Unhandled zookeeper exception removing leader node
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationT
        okenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,363 FATAL [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1535): RegionServer abort: loaded coprocessors are: []
        
        2011-11-23 15:40:42,363 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1538): Dump of metrics: requestsPerSecond=0, numberOfOnlineRegions=1, numberOfStores=1, numberOfStorefiles=0, storefileIndexSizeMB=0, rootIndexSizeKB=0, totalStaticIndexSizeKB=0, totalStaticBloomSizeKB=0, memstoreSizeMB=0, readRequestsCount=102, writeRequestsCount=100, compactionQueueSize=0, flushQueueSize=0, usedHeapMB=192, maxHeapMB=1244, blockCacheSizeMB=1.17, blockCacheFreeMB=247.73, blockCacheCount=1, blockCacheHitCount=48, blockCacheMissCount=14, blockCacheEvictedCount=13, blockCacheHitRatio=77%, blockCacheHitCachingRatio=77%, hdfsBlocksLocalityIndex=0
        
        2011-11-23 15:40:42,364 INFO  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] regionserver.HRegionServer(1455): STOPPED: Unhandled zookeeper exception removing leader node
        
        2011-11-23 15:40:42,364 WARN  [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZKUtil(470): regionserver:38035-0x133d1159c270005 Unable to get data of znode /hbase/tokenauth/keymaster
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.s
        top(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:96)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
        	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
        	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
        	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
        
        2011-11-23 15:40:42,365 ERROR [RegionServer:4;minerva.apache.org,38035,1322062814712-EventThread] zookeeper.ZooKeeperWatcher(403): regionserver:38035-0x133d1159c270005 Received unexpected KeeperException, re-throwing exception
        org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/tokenauth/keymaster
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
        	at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
        	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1113)
        	at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:295)
        	at org.apache.hadoop.hbase.zookeeper.ZKUtil.getData(ZKUtil.java:462)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:156)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$L
        eaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apache.hadoop.hbase.security.token.AuthenticationTokenSecretManager$LeaderElector.stop(AuthenticationTokenSecretManager.java:293)
        	at org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.stepDownAsLeader(ZKLeaderManager.java:167)
        	at org.apac