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