Jason Lowe created YARN-3619:
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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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