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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11923) Potential race condition in RecoverableZookeeper.checkZk()
Date Wed, 10 Sep 2014 03:41:30 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11923?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14128004#comment-14128004
] 

Lars Hofhansl commented on HBASE-11923:
---------------------------------------

Thanks [~enis], was occupied with a production incident all day.

> Potential race condition in RecoverableZookeeper.checkZk()
> ----------------------------------------------------------
>
>                 Key: HBASE-11923
>                 URL: https://issues.apache.org/jira/browse/HBASE-11923
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Lars Hofhansl
>            Assignee: Lars Hofhansl
>             Fix For: 0.99.0, 2.0.0, 0.98.7, 0.94.24
>
>         Attachments: 11923-trunk.txt, hbase-11923-0.94.patch
>
>
> [~apurtell] pointed out a potential race condition in RecoverableZookeeper.checkZk()
that I introduced in parent.
> If multiple threads would enter that method at the same time without a valid Zookeeper
reference, we could leak Zookeeper objects.
> Since this is not a on a hot code path we should just synchronize the two involved methods.



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