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https://issues.apache.org/jira/browse/YARN-2232?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Varun Vasudev updated YARN-2232:
--------------------------------

    Summary: ClientRMService doesn't allow delegation token owner to cancel 
their own token in secure mode  (was: ClientRMService doesn't allow delegation 
token owner to cancel their own token)

> ClientRMService doesn't allow delegation token owner to cancel their own 
> token in secure mode
> ---------------------------------------------------------------------------------------------
>
>                 Key: YARN-2232
>                 URL: https://issues.apache.org/jira/browse/YARN-2232
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Varun Vasudev
>            Assignee: Varun Vasudev
>         Attachments: apache-yarn-2232.0.patch
>
>
> The ClientRMSerivce doesn't allow delegation token owners to cancel their own 
> tokens. The root cause is this piece of code from the cancelDelegationToken 
> function -
> {noformat}
> String user = getRenewerForToken(token);
> ...
> private String getRenewerForToken(Token<RMDelegationTokenIdentifier> token) 
> throws IOException {
>   UserGroupInformation user = UserGroupInformation.getCurrentUser();
>   UserGroupInformation loginUser = UserGroupInformation.getLoginUser();
>   // we can always renew our own tokens
>   return loginUser.getUserName().equals(user.getUserName())
>       ? token.decodeIdentifier().getRenewer().toString()
>       : user.getShortUserName();
> }
> {noformat}
> It ends up passing the user short name to the cancelToken function whereas 
> AbstractDelegationTokenSecretManager::cancelToken expects the full user name. 
> This bug occurs in secure mode and is not an issue with simple auth.



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