Jason Lowe created MAPREDUCE-7033: ------------------------------------- Summary: Map outputs implicitly rely on permissive umask for shuffle Key: MAPREDUCE-7033 URL: https://issues.apache.org/jira/browse/MAPREDUCE-7033 Project: Hadoop Map/Reduce Issue Type: Bug Components: mrv2 Reporter: Jason Lowe
Map tasks do not explicitly set the permissions of their output files for shuffle. In a secure cluster the shuffle service is running as a different user than the map task, so the output files require group readability in order to serve up the data during the shuffle phase. If the user's UNIX umask is too restrictive (e.g.: 077) then the map task's file.out and file.out.index permissions can be too restrictive to allow the shuffle handler to access them. -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: mapreduce-dev-unsubscr...@hadoop.apache.org For additional commands, e-mail: mapreduce-dev-h...@hadoop.apache.org