Jason Lowe created TEZ-3894:
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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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