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https://issues.apache.org/jira/browse/SPARK-2648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14071996#comment-14071996
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Apache Spark commented on SPARK-2648:
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User 'lianhuiwang' has created a pull request for this issue:
https://github.com/apache/spark/pull/1549
> through shuffling blocksByAddress avoid much reducers to fetch data from a
> executor at a time
> ---------------------------------------------------------------------------------------------
>
> Key: SPARK-2648
> URL: https://issues.apache.org/jira/browse/SPARK-2648
> Project: Spark
> Issue Type: Improvement
> Reporter: Lianhui Wang
>
> 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
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