Zhijie Shen commented on YARN-2656:

I did some investigation on the test failure. It seems not to be the problem 
the test case, but the issue of DelegationTokenManager, which allows user to 
set external tokenManager, but make the assumption that all the token is 
o.a.h.security.token.delegation.DelegationTokenIdentifier. RM send 
RMDelegationTokenIdentifier and serialize the token in one way, and now 
DelegationTokenManager receives the token, and deserialize it in another way, 
resulting the bug. Will file ticket for this issue.

> RM web services authentication filter should add support for proxy user
> -----------------------------------------------------------------------
>                 Key: YARN-2656
>                 URL: https://issues.apache.org/jira/browse/YARN-2656
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>            Reporter: Varun Vasudev
>            Assignee: Varun Vasudev
>         Attachments: apache-yarn-2656.0.patch, apache-yarn-2656.1.patch, 
> apache-yarn-2656.2.patch
> The DelegationTokenAuthenticationFilter adds support for doAs functionality. 
> The RMAuthenticationFilter should expose this as well.

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