[HBASE-1311] ZooKeeperWrapper: Failed to set watcher on ZNode /hbase/master

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Fix Version/s: 0.20.0
• Assignee: Nitay Joffe
• Reporter: Andrew Kyle Purtell
• Created: 05/Apr/09 19:45
• Updated: 13/Sep/09 22:24
• Resolved: 11/May/09 20:23

Description

After about 12 hours of operation, this repeats over and over in the regionserver log:

2009-04-05 19:44:38,445 WARN org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper: Failed to set watcher on ZNode /hbase/master
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired
at org.apache.zookeeper.KeeperException.create(KeeperException.java:118)
at org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:709)
at org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.watchMasterAddress(ZooKeeperWrapper.java:235)
at org.apache.hadoop.hbase.regionserver.HRegionServer.watchMasterAddress(HRegionServer.java:343)
at org.apache.hadoop.hbase.regionserver.HRegionServer.process(HRegionServer.java:339)
at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:366)
2009-04-05 19:44:38,445 WARN org.apache.hadoop.hbase.regionserver.HRegionServer: Unable to set watcher on ZooKeeper master address. Retrying.

Issue Links

• relates to: HBASE-1315 when HRS znode expires while HRS is still running, HRS enters infinite loop