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https://issues.apache.org/jira/browse/MAPREDUCE-3159?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13134677#comment-13134677
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Arun C Murthy commented on MAPREDUCE-3159:
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No worries, go ahead. Please commit to both trunk and branch-0.23. Thanks.
> DefaultContainerExecutor removes appcache dir on every localization
> -------------------------------------------------------------------
>
> Key: MAPREDUCE-3159
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3159
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 0.23.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Blocker
> Fix For: 0.23.0
>
> Attachments: fix-jdoc.txt, mr-3159.txt, mr-3159.txt, mr-3159.txt
>
>
> The DefaultContainerExecutor currently has code that removes the application
> dir from appcache/ in the local directories on every task localization. This
> causes any concurrent executing tasks from the same job to fail.
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