Jian He created YARN-7490:
-----------------------------
Summary: ConcurrentModificationException in AMRMClient
Key: YARN-7490
URL: https://issues.apache.org/jira/browse/YARN-7490
Project: Hadoop YARN
Issue Type: Bug
Reporter: Jian He
It is observed that below exception occurred in service AM, looks like the
AMRMClientImpl -> ResourceRequestInfo -> containerRequests can be concurrently
accessed without protection
{code}
2017-11-13 19:48:10,487 [AMRM Callback Handler Thread] ERROR
service.ServiceScheduler - Error in AMRMClient callback handler
java.util.ConcurrentModificationException
at java.util.LinkedHashMap$LinkedHashIterator.nextNode(LinkedHashMap.java:711)
at java.util.LinkedHashMap$LinkedKeyIterator.next(LinkedHashMap.java:734)
at java.util.AbstractCollection.addAll(AbstractCollection.java:343)
at
org.apache.hadoop.yarn.client.api.impl.AMRMClientImpl.getMatchingRequests(AMRMClientImpl.java:680)
at
org.apache.hadoop.yarn.client.api.async.AMRMClientAsync.getMatchingRequests(AMRMClientAsync.java:239)
at
org.apache.hadoop.yarn.service.ServiceScheduler$AMRMClientCallback.onContainersAllocated(ServiceScheduler.java:486)
at
org.apache.hadoop.yarn.client.api.async.impl.AMRMClientAsyncImpl$CallbackHandlerThread.run(AMRMClientAsyncImpl.java:359)
{code}
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