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https://issues.apache.org/jira/browse/MAPREDUCE-2224?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13016924#comment-13016924
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Hudson commented on MAPREDUCE-2224:
-----------------------------------
Integrated in Hadoop-Mapreduce-trunk #643 (See
[https://hudson.apache.org/hudson/job/Hadoop-Mapreduce-trunk/643/])
> Synchronization bugs in JvmManager
> ----------------------------------
>
> Key: MAPREDUCE-2224
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2224
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: tasktracker
> Affects Versions: 0.22.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Critical
> Fix For: 0.22.0
>
> Attachments: mapreduce-2224-cdh3.txt, mapreduce-2224.txt,
> mapreduce-2224.txt, mapreduce-2224.txt, mapreduce-2224.txt
>
>
> JvmManager.JvmManagerForType has several HashMap members that are
> inconsistently synchronized. I've seen sporadic NPEs in the 0.20 version of
> this code which has similar bugs.
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