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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1961) [gridmix3] ConcurrentModificationException when shutting down Gridmix
Date Fri, 29 Oct 2010 02:06:20 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1961?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12926094#action_12926094
] 

Hudson commented on MAPREDUCE-1961:
-----------------------------------

Integrated in Hadoop-Mapreduce-trunk-Commit #523 (See [https://hudson.apache.org/hudson/job/Hadoop-Mapreduce-trunk-Commit/523/])
    

> [gridmix3] ConcurrentModificationException when shutting down Gridmix
> ---------------------------------------------------------------------
>
>                 Key: MAPREDUCE-1961
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1961
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: contrib/gridmix
>            Reporter: Hong Tang
>            Assignee: Hong Tang
>             Fix For: 0.22.0
>
>         Attachments: mr-1961-20100723.patch
>
>
> We observed the following exception occasionally at the end of the Gridmix run:
> {code}
> Exception in thread "StatsCollectorThread" java.util.ConcurrentModificationException
>           at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
>           at java.util.AbstractList$Itr.next(AbstractList.java:343)
>           at org.apache.hadoop.mapred.gridmix.Statistics$StatCollector.updateAndNotifyClusterStatsListeners(Statistics.java:220)
>           at org.apache.hadoop.mapred.gridmix.Statistics$StatCollector.run(Statistics.java:205)
> {code}

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