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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-3000) Potential infinite loop / log spew in ZookeeperHiveLockManager
Date Tue, 08 May 2012 01:02:06 GMT

    [ https://issues.apache.org/jira/browse/HIVE-3000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13270114#comment-13270114
] 

Hudson commented on HIVE-3000:
------------------------------

Integrated in Hive-trunk-h0.21 #1417 (See [https://builds.apache.org/job/Hive-trunk-h0.21/1417/])
    HIVE-3000 Potential infinite loop / log spew in ZookeeperHiveLockManager (njain via kevinwilfong)
(Revision 1335106)

     Result = FAILURE
kevinwilfong : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1335106
Files : 
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/lockmgr/zookeeper/ZooKeeperHiveLockManager.java

                
> 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
>            Assignee: Namit Jain
>             Fix For: 0.10.0
>
>         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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