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Dmitriy V. Ryaboy commented on PIG-2652: ---------------------------------------- +1. This code is quite the mess. At some point we need to refactor it. Not running sampling for skewed / merge / order jobs when parallelism is set to 1 should be a separate ticket (I think I filed it already? Maybe just meant to). Please commit to 10 and 11. > Skew join and order by don't trigger reducer estimation > ------------------------------------------------------- > > Key: PIG-2652 > URL: https://issues.apache.org/jira/browse/PIG-2652 > Project: Pig > Issue Type: Bug > Reporter: Bill Graham > Assignee: Bill Graham > Attachments: PIG-2652_1.patch > > > If neither PARALLEL, default parallel or {{mapred.reduce.tasks}} are set, the > number of reducers is not estimated based on input size for skew joins or > order by. Instead, these jobs get only 1 reducer. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira