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Date: Wed, 1 Feb 2012 12:50:59 +0000 (UTC)
From: "Hudson (Commented) (JIRA)" <jira@apache.org>
To: mapreduce-issues@hadoop.apache.org
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Subject: [jira] [Commented] (MAPREDUCE-3749) ConcurrentModificationException
 in counter groups
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    [ https://issues.apache.org/jira/browse/MAPREDUCE-3749?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13197803#comment-13197803 ] 

Hudson commented on MAPREDUCE-3749:
-----------------------------------

Integrated in Hadoop-Hdfs-0.23-Build #156 (See [https://builds.apache.org/job/Hadoop-Hdfs-0.23-Build/156/])
    Merge -r 1238733:1238734 from trunk to branch-0.23. Fixes: MAPREDUCE-3749

tomwhite : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1238735
Files : 
* /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/CHANGES.txt
* /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/counters/AbstractCounterGroup.java
* /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/counters/AbstractCounters.java
* /hadoop/common/branches/branch-0.23/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/test/java/org/apache/hadoop/mapred/TestCounters.java

                
> ConcurrentModificationException in counter groups
> -------------------------------------------------
>
>                 Key: MAPREDUCE-3749
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3749
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.0
>            Reporter: Tom White
>            Assignee: Tom White
>            Priority: Blocker
>             Fix For: 0.23.1
>
>         Attachments: MAPREDUCE-3749-concurrent.patch, MAPREDUCE-3749-test.patch, MAPREDUCE-3749.patch, MAPREDUCE-3749.patch
>
>
> Iterating over a counter's groups while adding more groups will cause a ConcurrentModificationException.
> This was found while running Hive unit tests against a recent 0.23 version.

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