[jira] [Updated] (YARN-2232) ClientRMService doesn't allow delegation token owner to cancel their own token

["Varun Vasudev (JIRA)" <ji...@apache.org>]

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

Varun Vasudev updated YARN-2232:
--------------------------------

    Attachment: apache-yarn-2232.0.patch

Uploaded patch with fix.

> ClientRMService doesn't allow delegation token owner to cancel their own token
> ------------------------------------------------------------------------------
>
>                 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.



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