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From "Jonathan Hsieh (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7616) NPE in ZKProcedureCoordinator$1.nodeCreated
Date Fri, 18 Jan 2013 01:13:11 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7616?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13556848#comment-13556848
] 

Jonathan Hsieh commented on HBASE-7616:
---------------------------------------

Snapshot tests pass on jenkins.  There is one core change (removing using implicit this instead
of reference to field of parent class) and then a semantics preserving readability change.
                
> NPE in ZKProcedureCoordinator$1.nodeCreated
> -------------------------------------------
>
>                 Key: HBASE-7616
>                 URL: https://issues.apache.org/jira/browse/HBASE-7616
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Jonathan Hsieh
>            Assignee: Jonathan Hsieh
>         Attachments: hbase-7616.patch
>
>
> In a unit test run we saw this in an unrelated test.  (testReplication)
> {code}
> 2013-01-15 13:07:47,337 DEBUG [pool-1-thread-1-EventThread] zookeeper.ZKUtil(1611): master:32835-0x13c4009e99f0003
Retrieved 28 byte(s) of data from znode /1/shutdown and set watcher; Tue Jan 15 13:07:47 PST
2013
> 2013-01-15 13:07:47,339 ERROR [pool-1-thread-1-EventThread] zookeeper.ClientCnxn$EventThread(521):
Error while calling watcher 
> java.lang.NullPointerException
> 	at org.apache.hadoop.hbase.procedure.ZKProcedureCoordinatorRpcs$1.nodeCreated(ZKProcedureCoordinatorRpcs.java:168)
> 	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:294)
> 	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:519)
> 	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:495)
> {code}
> This is likely due to an initialization race.

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