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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4194) ConcurrentModificationError in DirectoryCollection
Date Thu, 26 Apr 2012 13:24:20 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4194?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13262621#comment-13262621
] 

Hudson commented on MAPREDUCE-4194:
-----------------------------------

Integrated in Hadoop-Mapreduce-trunk #1061 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1061/])
    MAPREDUCE-4194. ConcurrentModificationError in DirectoryCollection (Jonathan Eagles via
bobby) (Revision 1330552)

     Result = FAILURE
bobby : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1330552
Files : 
* /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/DirectoryCollection.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/TestDirectoryCollection.java

                
> ConcurrentModificationError in DirectoryCollection
> --------------------------------------------------
>
>                 Key: MAPREDUCE-4194
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4194
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.3, 2.0.0
>            Reporter: Jonathan Eagles
>            Assignee: Jonathan Eagles
>             Fix For: 0.23.3, 2.0.0, 3.0.0
>
>         Attachments: MAPREDUCE-4194.patch, MAPREDUCE-4194.patch
>
>
> As found as part of work on MAPREDUCE-4169, it is possible for a ConcurrentModificationException
to be thrown upon disk failure. DirectoryCollection hands out its internal list structure
that is accessed across multiple threads. Upon disk failure its internal list is modified,
invalidating all current iterators to that structure.

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