Github user JoshRosen commented on the pull request:
https://github.com/apache/spark/pull/3366#issuecomment-65017779
@uncleGen Could you comment here to provide examples of when it's
beneficial to disable map-side aggregation? If there is a legitimate case for
disabling it, then we should add this option in Scala / Java as well.
Otherwise, do you mind closing this pull request?
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