[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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