Rohith Sharma K S created YARN-4685:
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Summary: AM blacklist addition/removal should get updated for
every allocate call from RMAppAttemptImpl.
Key: YARN-4685
URL: https://issues.apache.org/jira/browse/YARN-4685
Project: Hadoop YARN
Issue Type: Bug
Components: resourcemanager
Affects Versions: 2.8.0
Reporter: Rohith Sharma K S
Assignee: Rohith Sharma K S
Priority: Blocker
AM blacklist addition or removal is updated only when RMAppAttempt is scheduled
i.e {{RMAppAttemptImpl#ScheduleTransition#transition}}. But once attempt is
scheduled if there is any removeNode/addNode in cluster then this is not
updated to {{BlackListManager#refreshNodeHostCount}}. This leads
BlackListManager to operate on stale NM's count. And application is in ACCEPTED
state and wait forever even if we add more nodes to cluster.
*Solution* is update BlacklistManager for every
{{RMAppAttemptImpl#AMContainerAllocatedTransition#transition}} call. This
ensures if there is any addition/removal in nodes, this will be updated to
BlacklistManager
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