Github user rxin commented on a diff in the pull request: https://github.com/apache/spark/pull/1697#discussion_r15675815 --- Diff: core/src/main/scala/org/apache/spark/MapOutputTracker.scala --- @@ -284,6 +290,24 @@ private[spark] class MapOutputTrackerMaster(conf: SparkConf) cachedSerializedStatuses.contains(shuffleId) || mapStatuses.contains(shuffleId) } + // Return the list of locations and blockSizes for each reducer. + def getStatusByReducer(shuffleId: Int): Option[Map[Int, Array[(BlockManagerId, Long)]]] = { --- End diff -- also comment on how large the array is
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