Jian He created YARN-5175:
-----------------------------

             Summary: Simplify the delegation token renewal management for YARN 
localization and log-aggregation
                 Key: YARN-5175
                 URL: https://issues.apache.org/jira/browse/YARN-5175
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Jian He


Increasingly, this DelegationTokenRenewer class for renewing expiring token for 
localization and log-aggregation is getting complicated. We could have done it 
at a per-user level.  copying comments from vinod in YARN-5098



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