sandflee commented on YARN-4528:

HI, [~mding],  container decrease msg is passed like container complete msg 
passed from RM to AM. so a successfully nodeHeartBeat must ensure that 
container decrease msg is persisted in NM state store.

{code:title=RMAppAttemptImpl.java # pullJustFinishContainers}
      // A new allocate means the AM received the previously sent
      // finishedContainers. We can ack this to NM now

> decreaseContainer Message maybe lost if NM restart
> --------------------------------------------------
>                 Key: YARN-4528
>                 URL: https://issues.apache.org/jira/browse/YARN-4528
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: sandflee
>         Attachments: YARN-4528.01.patch
> we may pending the container decrease msg util next heartbeat. or checks the 
> resource with rmContainer when node register.

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