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Patrick Wendell resolved SPARK-2648. ------------------------------------ Resolution: Not a Problem It turns out we already randomized these, just in a different part of the code. > Randomize order of executors when fetching shuffle blocks > --------------------------------------------------------- > > Key: SPARK-2648 > URL: https://issues.apache.org/jira/browse/SPARK-2648 > Project: Spark > Issue Type: Improvement > Reporter: Lianhui Wang > Assignee: Lianhui Wang > Priority: Critical > > like mapreduce we need to shuffle blocksByAddress.it can avoid many reducers > to connect a executor at a time.when a map has many paritions, at a time > there has so much reduces connecting to this map.so it maybe make network's > connect to timeout. > i created PR for this issue:https://github.com/apache/spark/pull/1549 -- This message was sent by Atlassian JIRA (v6.2#6252)