Github user shivaram commented on the pull request: https://github.com/apache/spark/pull/8280#issuecomment-132345128 The diff I'm proposing is something like ``` + val numShuffleDeps = rdd.dependencies.filter(_.isInstanceOf[ShuffleDependency[_, _, _]]).length + // If the RDD has shuffle dependencies and shuffle locality is enabled, pick locations that // have at least REDUCER_PREF_LOCS_FRACTION of data as preferred locations - if (shuffleLocalityEnabled && rdd.partitions.length < SHUFFLE_PREF_REDUCE_THRESHOLD) { + if (numShuffleDeps == 1 && shuffleLocalityEnabled && + rdd.partitions.length < SHUFFLE_PREF_REDUCE_THRESHOLD) { ```
--- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. --- --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org