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https://issues.apache.org/jira/browse/HBASE-4875?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13159017#comment-13159017
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Jimmy Xiang commented on HBASE-4875:
------------------------------------
Can we just retry if it is session expired exception? Currently, it just retry
in case of (RecoverableZooKeeper):
case CONNECTIONLOSS:
case OPERATIONTIMEOUT:
> ZKLeaderManager.handleLeaderChange() doesn't handle
> KeeperException$SessionExpiredException
> -------------------------------------------------------------------------------------------
>
> Key: HBASE-4875
> URL: https://issues.apache.org/jira/browse/HBASE-4875
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.92.0
> Reporter: Ted Yu
>
> TestMasterFailover#testSimpleMasterFailover has failed twice in a row for
> builds 15 and 16.
> From
> https://builds.apache.org/view/G-L/view/HBase/job/HBase-0.92-security/16/testReport/org.apache.hadoop.hbase.master/TestMasterFailover/testSimpleMasterFailover/:
> {code}
> 2011-11-26 01:34:49,217 DEBUG
> [RegionServer:0;hemera.apache.org,57516,1322271278190-EventThread]
> zookeeper.ZooKeeperWatcher(257): regionserver:57516-0x133dd8281300003
> Received ZooKeeper Event, type=NodeDeleted, state=SyncConnected,
> path=/hbase/tokenauth/keymaster
> 2011-11-26 01:34:49,217 WARN [Thread-1-EventThread] zookeeper.ZKUtil(234):
> master:52934-0x133dd8281300001 Unable to set watcher on znode
> /hbase/tokenauth/keymaster
> org.apache.zookeeper.KeeperException$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.exists(ZooKeeper.java:1003)
> at
> org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.exists(RecoverableZooKeeper.java:154)
> at
> org.apache.hadoop.hbase.zookeeper.ZKUtil.watchAndCheckExists(ZKUtil.java:225)
> at
> org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:85)
> 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)
> 2011-11-26 01:34:49,218 ERROR [Thread-1-EventThread]
> zookeeper.ZooKeeperWatcher(403): master:52934-0x133dd8281300001 Received
> unexpected KeeperException, re-throwing exception
> org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode
> = Session expired for /hbase/tokenauth/keymaster
> at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
> at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
> at org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:1003)
> at
> org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.exists(RecoverableZooKeeper.java:154)
> at
> org.apache.hadoop.hbase.zookeeper.ZKUtil.watchAndCheckExists(ZKUtil.java:225)
> at
> org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.handleLeaderChange(ZKLeaderManager.java:85)
> at
> org.apache.hadoop.hbase.zookeeper.ZKLeaderManager.nodeDeleted(ZKLeaderManager.java:78)
> at
> org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:281)
> at
> org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
> at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
> 2011-11-26 01:34:49,216 DEBUG
> [RegionServer:2;hemera.apache.org,44702,1322271278232-EventThread]
> zookeeper.ZKUtil(230): hconnection-0x133dd8281300009 /hbase/master does not
> exist. Watcher is set.
> 2011-11-26 01:34:49,215 DEBUG [Thread-1-EventThread] zookeeper.ZKUtil(230):
> master:44883-0x133dd8281300002 /hbase/master does not exist. Watcher is set.
> 2011-11-26 01:34:49,219 DEBUG [Thread-1-EventThread]
> master.ActiveMasterManager(104): No master available. Notifying waiting
> threads
> 2011-11-26 01:34:49,215 INFO
> [Master:1;hemera.apache.org,52934,1322271278115] master.HMaster(338): HMaster
> main thread exiting
> {code}
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