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https://issues.apache.org/jira/browse/MAPREDUCE-4488?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13445410#comment-13445410
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Karthik Kambatla commented on MAPREDUCE-4488:
---------------------------------------------
As the stack trace shows, the deadlock is because of the following:
- {{JobInProgress#jobComplete()}} (while holding {{JobInProgress}} lock) is
blocked on the {{JobTracker}} lock via the call to synchronized method
{{JobTracker#getClusterStatus()}}
- {{FairScheduler}} (while holding the {{JobTracker}} lock by calling
{{synchronized heartbeat()}}) tries to acquire the {{JobInProgress}} lock via
the call to the synchronized method {{JobInProgress#runningMaps()}}
> Port MAPREDUCE-463 (The job setup and cleanup tasks should be optional) to
> branch-1
> -----------------------------------------------------------------------------------
>
> Key: MAPREDUCE-4488
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4488
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Components: mrv1, performance
> Affects Versions: 1.0.3
> Reporter: Tom White
> Assignee: Tom White
> Attachments: MAPREDUCE-4488.patch
>
>
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