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Ye Zhou commented on MAPREDUCE-6697: ------------------------------------ Hi, [~nroberts]. Would you also create a patch for 2.7 branch? This should be helpful for the ongoing 2.7.4 release. Thanks. > Concurrent task limits should only be applied when necessary > ------------------------------------------------------------ > > Key: MAPREDUCE-6697 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-6697 > Project: Hadoop Map/Reduce > Issue Type: Bug > Components: mrv2 > Affects Versions: 2.7.0 > Reporter: Jason Lowe > Assignee: Nathan Roberts > Fix For: 2.9.0, 3.0.0-alpha4 > > Attachments: MAPREDUCE-6697-v1.patch > > > The concurrent task limit feature should only adjust the ANY portion of the > AM heartbeat ask when a limit is truly necessary, otherwise extraneous > containers could be allocated by the RM to the AM adding some overhead to > both. Specifying a concurrent task limit that is beyond the total number of > tasks in the job should be the same as asking for no limit. -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: mapreduce-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: mapreduce-issues-h...@hadoop.apache.org