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https://issues.apache.org/jira/browse/MAPREDUCE-3569?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vinod Kumar Vavilapalli updated MAPREDUCE-3569:
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Status: Patch Available (was: Open)
> TaskAttemptListener holds a global lock for all task-updates
> ------------------------------------------------------------
>
> Key: MAPREDUCE-3569
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3569
> Project: Hadoop Map/Reduce
> Issue Type: Sub-task
> Components: mr-am, mrv2, performance
> Affects Versions: 0.23.1
> Reporter: Vinod Kumar Vavilapalli
> Assignee: Vinod Kumar Vavilapalli
> Priority: Critical
> Fix For: 0.23.1
>
> Attachments: MAPREDUCE-3569-20111115.1.txt,
> MAPREDUCE-3569-20120104.txt
>
>
> This got added via MAPREDUCE-3274. We really don't need the lock if we just
> implement what I mentioned on that ticket
> [here|https://issues.apache.org/jira/browse/MAPREDUCE-3274?focusedCommentId=13137214&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13137214].
> This has performance implications on MR AM with lots of tasks.
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