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https://issues.apache.org/jira/browse/MAPREDUCE-3519?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13166322#comment-13166322
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Robert Joseph Evans commented on MAPREDUCE-3519:
------------------------------------------------
I moved this issue to blocker because we have seen this issue show up in our
tests and it is blocking us from running tests because it stops some of the
tests from completing.
> Deadlock in LocalDirsHandlerService and ShuffleHandler
> ------------------------------------------------------
>
> Key: MAPREDUCE-3519
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3519
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2, nodemanager
> Affects Versions: 0.23.1, 0.24.0
> Reporter: Ravi Gummadi
> Assignee: Ravi Gummadi
> Priority: Blocker
> Fix For: 0.23.1
>
> Attachments: 3519.patch, 3519.v1.patch, deadlock.txt
>
>
> MAPREDUCE-3121 cloned Configuration object in LocalDirsHandlerService.init()
> to avoid others to access that configuration object. But since it is used in
> local FileSystem object creation in LocalDirAllocator.AllocatorPerContext and
> the same FileSystem object is used in
> ShuffleHandler.Shuffle.localDirAllocator, this is causing a deadlock when
> accessing this configuration object from LocalDirsHandlerService and
> ShuffleHandler along with AllocatorPerContext object.
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