Details
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Bug
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Status: Closed
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Critical
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Resolution: Duplicate
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0.94.2
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None
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None
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CDH 4.2.0
Description
Here you can see the relevant section of a thread dump:
Found one Java-level deadlock: ============================= "AsyncSave-700512-Worker-EventThread": waiting to lock monitor 0x00007f8d90eecd20 (object 0x00000005c0a8e1d0, a org.apache.hadoop.hbase.zookeeper.RootRegionTracker), which is held by "AsyncSave-700546-Worker" "AsyncSave-700546-Worker": waiting to lock monitor 0x00007f8d90149700 (object 0x0000000571404180, a org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation), which is held by "AsyncSave-700512-Worker-EventThread" Java stack information for the threads listed above: =================================================== "AsyncSave-700512-Worker-EventThread": at org.apache.hadoop.hbase.zookeeper.ZooKeeperNodeTracker.stop(ZooKeeperNodeTracker.java:98) - waiting to lock <0x00000005c0a8e1d0> (a org.apache.hadoop.hbase.zookeeper.RootRegionTracker) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.resetZooKeeperTrackers(HConnectionManager.java:603) - locked <0x0000000571404180> (a org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.abort(HConnectionManager.java:1681) at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.connectionEvent(ZooKeeperWatcher.java:389) at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:286) at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:519) at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:495) "AsyncSave-700546-Worker": at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.resetZooKeeperTrackers(HConnectionManager.java:598) - waiting to lock <0x0000000571404180> (a org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.abort(HConnectionManager.java:1681) at org.apache.hadoop.hbase.zookeeper.ZooKeeperNodeTracker.blockUntilAvailable(ZooKeeperNodeTracker.java:132) - locked <0x00000005c0a8e1d0> (a org.apache.hadoop.hbase.zookeeper.RootRegionTracker) at org.apache.hadoop.hbase.zookeeper.RootRegionTracker.waitRootRegionLocation(RootRegionTracker.java:83) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:841) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegionInMeta(HConnectionManager.java:954) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:852) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegionInMeta(HConnectionManager.java:954) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:856) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:813) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.processBatchCallback(HConnectionManager.java:1503) at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.processBatch(HConnectionManager.java:1388) at org.apache.hadoop.hbase.client.HTable.flushCommits(HTable.java:955) at org.apache.hadoop.hbase.client.HTablePool$PooledHTable.flushCommits(HTablePool.java:449) at ...