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https://issues.apache.org/jira/browse/SPARK-17574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15498659#comment-15498659
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Apache Spark commented on SPARK-17574:
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User 'viirya' has created a pull request for this issue:
https://github.com/apache/spark/pull/15128
> Cache ShuffleExchange RDD when the exchange is reused
> -----------------------------------------------------
>
> Key: SPARK-17574
> URL: https://issues.apache.org/jira/browse/SPARK-17574
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Reporter: Liang-Chi Hsieh
>
> We have the rule ReuseExchange to reuse exchange in the physical plan.
> However, for a ShuffleExchange we still need to retrieve remote blocks again
> when the shuffle exchange is reused. We can cache the RDD of the reused
> ShuffleExchange to avoid transferring remote blocks again.
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