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Posted to dev@hbase.apache.org by "Andrew Purtell (JIRA)" <ji...@apache.org> on 2014/01/10 23:49:50 UTC
[jira] [Resolved] (HBASE-10310) ZNodeCleaner session expired for
/hbase/master
[ https://issues.apache.org/jira/browse/HBASE-10310?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andrew Purtell resolved HBASE-10310.
------------------------------------
Resolution: Fixed
Fix Version/s: 0.99.0
0.96.2
0.98.0
Hadoop Flags: Reviewed
Committed to trunk, 0.98, and 0.96. Thanks for the patch Samir!
> ZNodeCleaner session expired for /hbase/master
> ----------------------------------------------
>
> Key: HBASE-10310
> URL: https://issues.apache.org/jira/browse/HBASE-10310
> Project: HBase
> Issue Type: Bug
> Components: master
> Affects Versions: 0.96.1.1
> Environment: x86_64 GNU/Linux
> Reporter: Samir Ahmic
> Assignee: Samir Ahmic
> Fix For: 0.98.0, 0.96.2, 0.99.0
>
> Attachments: HBASE-10310.patch
>
>
> I was testing "hbase master clear" command while working on [HBASE-7386] here is command and exception:
> {code}
> $ export HBASE_ZNODE_FILE=/tmp/hbase-hadoop-master.znode; ./hbase master clear
> 14/01/10 14:05:44 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=zk1:2181 sessionTimeout=90000 watcher=clean znode for master, quorum=zk1:2181, baseZNode=/hbase
> 14/01/10 14:05:44 INFO zookeeper.RecoverableZooKeeper: Process identifier=clean znode for master connecting to ZooKeeper ensemble=zk1:2181
> 14/01/10 14:05:44 INFO zookeeper.ClientCnxn: Opening socket connection to server zk1/172.17.33.5:2181. Will not attempt to authenticate using SASL (Unable to locate a login configuration)
> 14/01/10 14:05:44 INFO zookeeper.ClientCnxn: Socket connection established to zk11/172.17.33.5:2181, initiating session
> 14/01/10 14:05:44 INFO zookeeper.ClientCnxn: Session establishment complete on server zk1/172.17.33.5:2181, sessionid = 0x1427a96bfea4a8a, negotiated timeout = 40000
> 14/01/10 14:05:44 INFO zookeeper.ZooKeeper: Session: 0x1427a96bfea4a8a closed
> 14/01/10 14:05:44 INFO zookeeper.ClientCnxn: EventThread shut down
> 14/01/10 14:05:44 WARN zookeeper.RecoverableZooKeeper: Possibly transient ZooKeeper, quorum=zk1:2181, exception=org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/master
> 14/01/10 14:05:44 INFO util.RetryCounter: Sleeping 1000ms before retry #0...
> 14/01/10 14:05:45 WARN zookeeper.RecoverableZooKeeper: Possibly transient ZooKeeper, quorum=zk1:2181, exception=org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/master
> 14/01/10 14:05:45 ERROR zookeeper.RecoverableZooKeeper: ZooKeeper getData failed after 1 attempts
> 14/01/10 14:05:45 WARN zookeeper.ZKUtil: clean znode for master-0x1427a96bfea4a8a, quorum=zk1:2181, baseZNode=/hbase Unable to get data of znode /hbase/master
> org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/master
> at org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
> at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
> at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1151)
> at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:337)
> at org.apache.hadoop.hbase.zookeeper.ZKUtil.getDataNoWatch(ZKUtil.java:777)
> at org.apache.hadoop.hbase.zookeeper.MasterAddressTracker.deleteIfEquals(MasterAddressTracker.java:170)
> at org.apache.hadoop.hbase.ZNodeClearer.clear(ZNodeClearer.java:160)
> at org.apache.hadoop.hbase.master.HMasterCommandLine.run(HMasterCommandLine.java:138)
> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
> at org.apache.hadoop.hbase.util.ServerCommandLine.doMain(ServerCommandLine.java:126)
> at org.apache.hadoop.hbase.master.HMaster.main(HMaster.java:2779)
> 14/01/10 14:05:45 ERROR zookeeper.ZooKeeperWatcher: clean znode for master-0x1427a96bfea4a8a, quorum=zk1:2181, baseZNode=/hbase Received unexpected KeeperException, re-throwing exception
> org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/master
> 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:1151)
> at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:337)
> at org.apache.hadoop.hbase.zookeeper.ZKUtil.getDataNoWatch(ZKUtil.java:777)
> at org.apache.hadoop.hbase.zookeeper.MasterAddressTracker.deleteIfEquals(MasterAddressTracker.java:170)
> at org.apache.hadoop.hbase.ZNodeClearer.clear(ZNodeClearer.java:160)
> at org.apache.hadoop.hbase.master.HMasterCommandLine.run(HMasterCommandLine.java:138)
> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
> at org.apache.hadoop.hbase.util.ServerCommandLine.doMain(ServerCommandLine.java:126)
> at org.apache.hadoop.hbase.master.HMaster.main(HMaster.java:2779)
> 14/01/10 14:05:45 WARN zookeeper.ZooKeeperNodeTracker: Can't get or delete the master znode
> org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /hbase/master
> 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:1151)
> at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.getData(RecoverableZooKeeper.java:337)
> at org.apache.hadoop.hbase.zookeeper.ZKUtil.getDataNoWatch(ZKUtil.java:777)
> at org.apache.hadoop.hbase.zookeeper.MasterAddressTracker.deleteIfEquals(MasterAddressTracker.java:170)
> at org.apache.hadoop.hbase.ZNodeClearer.clear(ZNodeClearer.java:160)
> at org.apache.hadoop.hbase.master.HMasterCommandLine.run(HMasterCommandLine.java:138)
> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
> at org.apache.hadoop.hbase.util.ServerCommandLine.doMain(ServerCommandLine.java:126)
> at org.apache.hadoop.hbase.master.HMaster.main(HMaster.java:2779)
> {code}
> After checking ZNodeCleaner.java i notice this lines :
> {code}
> try {
> znodeFileContent = ZNodeClearer.readMyEphemeralNodeOnDisk();
>
> } catch (FileNotFoundException fnfe) {
> // If no file, just keep going -- return success.
> LOG.warn("Can't find the znode file; presume non-fatal", fnfe);
> return true;
> } catch (IOException e) {
> LOG.warn("Can't read the content of the znode file", e);
> return false;
> } finally {
> zkw.close();
> }
> return MasterAddressTracker.deleteIfEquals(zkw, znodeFileContent);
> }
> {code}
> Looks like we are closing zookeeper connection prematurely. After moving
> {code} return MasterAddressTracker.deleteIfEquals(zkw, znodeFileContent); {code} inside try block issue was fixed.
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