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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-3619) ContainerMetrics unregisters during getMetrics and leads to ConcurrentModificationException
Date Mon, 11 May 2015 20:19:00 GMT
Jason Lowe created YARN-3619:
--------------------------------

             Summary: ContainerMetrics unregisters during getMetrics and leads to ConcurrentModificationException
                 Key: YARN-3619
                 URL: https://issues.apache.org/jira/browse/YARN-3619
             Project: Hadoop YARN
          Issue Type: Bug
          Components: nodemanager
    Affects Versions: 2.7.0
            Reporter: Jason Lowe


ContainerMetrics is able to unregister itself during the getMetrics method, but that method
can be called by MetricsSystemImpl.sampleMetrics which is trying to iterate the sources. 
This leads to a ConcurrentModificationException log like this:
{noformat}
2015-05-11 14:00:20,360 [Timer for 'NodeManager' metrics system] WARN impl.MetricsSystemImpl:
java.util.ConcurrentModificationException
{noformat}



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