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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Created] (TEZ-3894) Tez intermediate outputs implicitly rely on permissive umask for shuffle
Date Wed, 31 Jan 2018 21:01:00 GMT
Jason Lowe created TEZ-3894:
-------------------------------

             Summary: Tez intermediate outputs implicitly rely on permissive umask for shuffle
                 Key: TEZ-3894
                 URL: https://issues.apache.org/jira/browse/TEZ-3894
             Project: Apache Tez
          Issue Type: Bug
            Reporter: Jason Lowe
            Assignee: Jason Lowe


Tez does not explicitly set the permissions of intermediate output files for shuffle. In a
secure cluster the shuffle service is running as a different user than the task, so the output
files require group readability in order to serve up the data during the shuffle phase. If
the umask is too restrictive (e.g.: 077) then the task's file.out and file.out.index permissions
can be too restrictive to allow the shuffle handler to access them.



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