sandflee created YARN-3387:

             Summary: container complete message couldn't pass to am if am 
restarted and rm changed
                 Key: YARN-3387
             Project: Hadoop YARN
          Issue Type: Bug
          Components: resourcemanager
    Affects Versions: 2.6.0
            Reporter: sandflee

suppose am work preserving and rm ha is enabled.
container complete message is passed to appattemt.justFinishedContainers in 
rm。in normal situation,all attempt in one app shares the same 
justFinishedContainers, but when rm changed, every attempt has it's own 
justFinishedContainers, so in situations below, container complete message 
couldn't passed to am:
1, am restart
2, rm changes
3, container launched by first am completes
container complete message will be passed to appAttempt1 not appAttempt2, but 
am pull finished containers from appAttempt2 (currentAppAttempt)

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