Major Description
We ran into a situation where due to a Kerberos configuration problem one of our region server could not connect to ZK when opening a region. Instead of shutting down it continue to try to reconnect. Eventually the master would assign the region to another region server. Each time that region server was assigned a region it would sit there for 5 mins with the region offline. It would have been better if the region server had shut itself down.
This is in the logs:
2013-08-16 17:31:35,999 WARN org.apache.hadoop.hbase.zookeeper.ZKUtil: hconnection-0x2407b842ff2012d-0x2407b842ff2012d-0x2407b842ff2012d Unable to set watcher on znode (/hbase/hbaseid)
org.apache.zookeeper.KeeperException$AuthFailedException: KeeperErrorCode = AuthFailed for /hbase/hbaseid
at org.apache.zookeeper.KeeperException.create(KeeperException.java:123)
at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
at org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:1041)
at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.exists(RecoverableZooKeeper.java:172)
at org.apache.hadoop.hbase.zookeeper.ZKUtil.checkExists(ZKUtil.java:450)
at org.apache.hadoop.hbase.zookeeper.ClusterId.readClusterIdZNode(ClusterId.java:61)
at org.apache.hadoop.hbase.zookeeper.ClusterId.getId(ClusterId.java:50)
at org.apache.hadoop.hbase.zookeeper.ClusterId.hasId(ClusterId.java:44)
at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.ensureZookeeperTrackers(HConnectionManager.java:616)
at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:882)
at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:857)
at org.apache.hadoop.hbase.client.HTable.finishSetup(HTable.java:233)
at org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:173)
at org.apache.hadoop.hbase.catalog.MetaReader.getHTable(MetaReader.java:201)
at org.apache.hadoop.hbase.catalog.MetaReader.getMetaHTable(MetaReader.java:227)
at org.apache.hadoop.hbase.catalog.MetaReader.getCatalogHTable(MetaReader.java:214)
at org.apache.hadoop.hbase.catalog.MetaEditor.putToCatalogTable(MetaEditor.java:91)
at org.apache.hadoop.hbase.catalog.MetaEditor.updateLocation(MetaEditor.java:296)
at org.apache.hadoop.hbase.catalog.MetaEditor.updateRegionLocation(MetaEditor.java:276)
at org.apache.hadoop.hbase.regionserver.HRegionServer.postOpenDeployTasks(HRegionServer.java:1828)
at org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler$PostOpenDeployTasksThread.run(OpenRegionHandler.java:240)
I think the RS should shut itself down instead.