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https://issues.apache.org/jira/browse/HIVE-3000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13269125#comment-13269125
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Namit Jain commented on HIVE-3000:
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https://reviews.facebook.net/D3063
> Potential infinite loop / log spew in ZookeeperHiveLockManager
> --------------------------------------------------------------
>
> Key: HIVE-3000
> URL: https://issues.apache.org/jira/browse/HIVE-3000
> Project: Hive
> Issue Type: Bug
> Components: Locking
> Affects Versions: 0.9.0
> Reporter: Paul Yang
> Attachments: HIVE-3000.D3063.1.patch
>
>
> See ZookeeperHiveLockManger.lock()
> If Zookeeper is in a bad state, it's possible to get an exception (e.g.
> org.apache.zookeeper.KeeperException$SessionExpiredException) when we call
> lockPrimitive(). There is a bug in the exception handler where the loop does
> not exit because the break in the switch statement gets out the switch, not
> the do..while loop. Because tryNum was not incremented due to the exception,
> lockPrimitive() will be called in an infinite loop, as fast as possible.
> Since the exception is printed for each call, Hive will produce significant
> log spew.
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