Arun Suresh created YARN-7192:
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             Summary: Add a pluggable StateMachine Listener that is notified of 
NM Container State changes
                 Key: YARN-7192
                 URL: https://issues.apache.org/jira/browse/YARN-7192
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Arun Suresh
            Assignee: Arun Suresh


This JIRA is to add support for a plugggable class in the NodeManager that is 
notified of changes to the Container StateMachine state and the events that 
caused the change.

The proposal is to modify the basic StateMachine class add support for a hook 
that is called before and after a transition.



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