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https://issues.apache.org/jira/browse/MAPREDUCE-3569?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13180207#comment-13180207
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Hudson commented on MAPREDUCE-3569:
-----------------------------------
Integrated in Hadoop-Hdfs-trunk-Commit #1571 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk-Commit/1571/])
MAPREDUCE-3569. TaskAttemptListener holds a global lock for all
task-updates. (Contributed by Vinod Kumar Vavilapalli)
sseth : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1227485
Files :
* /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapred/TaskAttemptListenerImpl.java
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/TaskAttemptListener.java
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/job/impl/TaskAttemptImpl.java
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapred/TestTaskAttemptListenerImpl.java
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/MRApp.java
> 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, MR3569.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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