Junping Du created YARN-3223:

             Summary: Resource update during NM graceful decommission
                 Key: YARN-3223
                 URL: https://issues.apache.org/jira/browse/YARN-3223
             Project: Hadoop YARN
          Issue Type: Sub-task
          Components: nodemanager, resourcemanager
            Reporter: Junping Du

During NM graceful decommission, we should handle resource update properly, 
include: make RMNode keep track of old resource for possible rollback, keep 
available resource to 0 and used resource get updated when
container finished.

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