Jian He created YARN-2853:
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Summary: Killing app may hang while AM is unregistering
Key: YARN-2853
URL: https://issues.apache.org/jira/browse/YARN-2853
Project: Hadoop YARN
Issue Type: Bug
Reporter: Jian He
Assignee: Jian He
When killing an app, app first moves to KILLING state, If RMAppAttempt receives
the attempt_unregister event before attempt_kill event, it'll ignore the later
attempt_kill event. Hence, RMApp won't be able to move to KILLED state and
stays at KILLING state forever.
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