Zhijie Shen created YARN-1494:
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             Summary: YarnClient doesn't wrap 
renewDelegationToken/cancelDelegationToken of ApplicationClientProtocol
                 Key: YARN-1494
                 URL: https://issues.apache.org/jira/browse/YARN-1494
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Zhijie Shen


YarnClient doesn't wrap renewDelegationToken/cancelDelegationToken of 
ApplicationClientProtocol, but getDelegationToken. After YARN-1363, 
renewDelegationToken/cancelDelegationToken  are going to be async, such that 
procedure of canceling/renewing a DT is not that straightforward. It's better 
to wrap these two APIs as well.



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