Junping Du created MAPREDUCE-4660:
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Summary: Update task placement policy for NetworkTopology with
'NodeGroup' layer
Key: MAPREDUCE-4660
URL: https://issues.apache.org/jira/browse/MAPREDUCE-4660
Project: Hadoop Map/Reduce
Issue Type: New Feature
Components: jobtracker, mrv1, scheduler
Reporter: Junping Du
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