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https://issues.apache.org/jira/browse/SPARK-3409?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Reynold Xin resolved SPARK-3409.
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Resolution: Fixed
Fix Version/s: 1.2.0
> Avoid pulling in Exchange operator itself in Exchange's closures
> ----------------------------------------------------------------
>
> Key: SPARK-3409
> URL: https://issues.apache.org/jira/browse/SPARK-3409
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Reynold Xin
> Assignee: Reynold Xin
> Fix For: 1.2.0
>
>
> {code}
> val rdd = child.execute().mapPartitions { iter =>
> if (sortBasedShuffleOn) {
> iter.map(r => (null, r.copy()))
> } else {
> val mutablePair = new MutablePair[Null, Row]()
> iter.map(r => mutablePair.update(null, r))
> }
> }
> {code}
> The above snippet from Exchange references sortBasedShuffleOn within a
> closure, which requires pulling in the entire Exchange object in the closure.
> This is a tiny teeny optimization.
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