Naganarasimha G R created YARN-4215:

             Summary: RMNodeLabels Manager Need to verify and replace node 
labels for the only modified Node Label Mappings in the request
                 Key: YARN-4215
             Project: Hadoop YARN
          Issue Type: Sub-task
            Reporter: Naganarasimha G R
            Assignee: Naganarasimha G R

Modified node Labels needs to be updated by the capacity scheduler holding a 
lock hence its better to push events to scheduler only when there is actually a 
change in the label mapping for a given node.  

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