Github user tgravescs commented on the pull request:
https://github.com/apache/spark/pull/7489#issuecomment-123371110
hmm, perhaps its an interaction with the RM Ha:
15/07/21 16:02:35 INFO client.ConfiguredRMFailoverProxyProvider: Failing
over to rm1
15/07/21 16:02:35 INFO retry.RetryInvocationHandler: Exception while
invoking getClusterNodes of class ApplicationClientProtocolPBClientImpl over
rm1 after 6 fail over attempts. Trying to fail over immediately.
we don't use RM HA. Either way I think we should just remove the
getNodeReport call in https://issues.apache.org/jira/browse/SPARK-8988. Then
this wouldn't be an issue.
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