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From "Hong Tang (JIRA)" <j...@apache.org>
Subject [jira] Created: (MAPREDUCE-1961) [gridmix3] ConcurrentModificationException when shutting down Gridmix
Date Fri, 23 Jul 2010 00:48:51 GMT
[gridmix3] ConcurrentModificationException when shutting down Gridmix
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                 Key: MAPREDUCE-1961
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1961
             Project: Hadoop Map/Reduce
          Issue Type: Bug
            Reporter: Hong Tang


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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