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https://issues.apache.org/jira/browse/MAPREDUCE-5513?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13779817#comment-13779817
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Hudson commented on MAPREDUCE-5513:
-----------------------------------
FAILURE: Integrated in Hadoop-Yarn-trunk #345 (See
[https://builds.apache.org/job/Hadoop-Yarn-trunk/345/])
MAPREDUCE-5513. ConcurrentModificationException in JobControl. Contributed by
Robert Parker (jlowe:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1526688)
* /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/jobcontrol/JobControl.java
> ConcurrentModificationException in JobControl
> ---------------------------------------------
>
> Key: MAPREDUCE-5513
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5513
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 2.1.0-beta, 0.23.9
> Reporter: Jason Lowe
> Assignee: Robert Parker
> Fix For: 3.0.0, 0.23.10, 2.1.2-beta
>
> Attachments: MAPREDUCE-5513-1.patch
>
>
> JobControl.toList is locking individual lists to iterate them, but those
> lists can be modified elsewhere without holding the list lock. The locking
> approaches are mismatched, with toList holding the lock on the actual list
> object while other methods hold the JobControl lock when modifying the lists.
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