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From "Devaraj K (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-303) ProcfsBasedProcessTree throws ConcurrentModificationException
Date Wed, 02 Jan 2013 06:06:12 GMT
Devaraj K created YARN-303:
------------------------------

             Summary: ProcfsBasedProcessTree throws ConcurrentModificationException
                 Key: YARN-303
                 URL: https://issues.apache.org/jira/browse/YARN-303
             Project: Hadoop YARN
          Issue Type: Bug
    Affects Versions: 2.0.1-alpha, 3.0.0, 2.0.2-alpha
            Reporter: Devaraj K
            Assignee: Devaraj K


{code:xml}
Error: java.util.ConcurrentModificationException
	at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
	at java.util.HashMap$EntryIterator.next(HashMap.java:834)
	at java.util.HashMap$EntryIterator.next(HashMap.java:832)
	at org.apache.hadoop.yarn.util.ProcfsBasedProcessTree.getProcessTree(ProcfsBasedProcessTree.java:208)
	at org.apache.hadoop.yarn.util.LinuxResourceCalculatorPlugin.getProcResourceValues(LinuxResourceCalculatorPlugin.java:406)
	at org.apache.hadoop.mapred.Task.getCurrentProcResourceValues(Task.java:810)
	at org.apache.hadoop.mapred.BlockMapOutputBuffer.sortAndSpill(BlockMapOutputBuffer.java:235)
	at org.apache.hadoop.mapred.BlockMapOutputBuffer.flush(BlockMapOutputBuffer.java:322)
	at org.apache.hadoop.mapred.MapTask$NewOutputCollector.close(MapTask.java:677)
	at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:745)
	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:333)
	at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:154)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:396)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1232)
	at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:149)
{code}

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