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Date: Tue, 17 Mar 2009 08:18:50 -0700 (PDT)
From: "Hemanth Yamijala (JIRA)" <jira@apache.org>
To: core-dev@hadoop.apache.org
Subject: [jira] Updated: (HADOOP-5516) TaskMemoryManagerThread crashes in a
 corner case
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     [ https://issues.apache.org/jira/browse/HADOOP-5516?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hemanth Yamijala updated HADOOP-5516:
-------------------------------------

    Status: Patch Available  (was: Open)

> 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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