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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1311) ZooKeeperWrapper: Failed to set watcher on ZNode /hbase/master
Date Tue, 07 Apr 2009 21:22:12 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1311?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12696763#action_12696763
] 

Andrew Purtell commented on HBASE-1311:
---------------------------------------

Hi Nitay. I did try to indicate my patch was a dumb hack. :-) Just for illustration to show
what worked for me for 1311 while tinkering around....

> ZooKeeperWrapper: Failed to set watcher on ZNode /hbase/master
> --------------------------------------------------------------
>
>                 Key: HBASE-1311
>                 URL: https://issues.apache.org/jira/browse/HBASE-1311
>             Project: Hadoop HBase
>          Issue Type: Bug
>            Reporter: Andrew Purtell
>            Assignee: Nitay Joffe
>         Attachments: dumb-wrapper-hack.patch
>
>
> 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.

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