zhihai xu created YARN-2641:
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             Summary: improve node decommission latency in RM.
                 Key: YARN-2641
                 URL: https://issues.apache.org/jira/browse/YARN-2641
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: resourcemanager
    Affects Versions: 2.5.0
            Reporter: zhihai xu
            Assignee: zhihai xu


improve node decommission latency in RM. 
Currently the node decommission only happened after RM received nodeHeartbeat 
from the Node Manager. The node heartbeat interval is configurable. The default 
value is 1 second.
It will be better to do the decommission during RM Refresh(NodesListManager) 
instead of nodeHeartbeat(ResourceTrackerService).



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