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Posted to yarn-issues@hadoop.apache.org by "Jason Lowe (JIRA)" <ji...@apache.org> on 2015/04/06 22:36:12 UTC

[jira] [Created] (YARN-3452) Bogus token usernames cause many invalid group lookups

Jason Lowe created YARN-3452:
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             Summary: Bogus token usernames cause many invalid group lookups
                 Key: YARN-3452
                 URL: https://issues.apache.org/jira/browse/YARN-3452
             Project: Hadoop YARN
          Issue Type: Bug
          Components: security
            Reporter: Jason Lowe


YARN uses a number of bogus usernames for tokens, like application attempt IDs for NM tokens or even the hardcoded "testing" for the container localizer token.  These tokens cause the RPC layer to do group lookups on these bogus usernames which will never succeed but can take a long time to perform.



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