John Doe created YARN-11847:
-------------------------------

             Summary: getGroupsForUser may be invoked on a null
                 Key: YARN-11847
                 URL: https://issues.apache.org/jira/browse/YARN-11847
             Project: Hadoop YARN
          Issue Type: Bug
    Affects Versions: 3.4.1
            Reporter: John Doe


`setRMAdmin()` in `DefaultRMAdminRequestInterceptor` can set `rmAdminProxy` to 
`null`; after that, if we invoke `getGroupsForUser`, a null pointer exception 
occurs.



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