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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5516) TaskMemoryManagerThread crashes in a corner case
Date Wed, 18 Mar 2009 17:21:50 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5516?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12683089#action_12683089
] 

Hudson commented on HADOOP-5516:
--------------------------------

Integrated in Hadoop-trunk #783 (See [http://hudson.zones.apache.org/hudson/job/Hadoop-trunk/783/])
    . Fix NullPointerException in TaskMemoryManagerThread that comes when monitored processes
disappear when the thread is running. Contributed by Vinod Kumar Vavilapalli.


> TaskMemoryManagerThread crashes in a corner case
> ------------------------------------------------
>
>                 Key: HADOOP-5516
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5516
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.20.0
>            Reporter: Vinod K V
>            Assignee: Vinod K V
>            Priority: Blocker
>             Fix For: 0.20.0
>
>         Attachments: HADOOP-5516-1.txt, HADOOP-5516-trunk-1.txt, HADOOP-5516-trunk-2.txt
>
>
> TT's stdout says.
> {code}
> Exception in thread "org.apache.hadoop.mapred.TaskMemoryManagerThread" java.lang.NullPointerException
>         at org.apache.hadoop.util.ProcfsBasedProcessTree.getProcessTree(ProcfsBasedProcessTree.java:126)
>         at org.apache.hadoop.mapred.TaskMemoryManagerThread.run(TaskMemoryManagerThread.java:200)
> {code}
> TaskMemoryManager crashes and no further memory management is done.

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