xuanyuanking commented on a change in pull request #24110: [SPARK-25341][Core]
Support rolling back a shuffle map stage and re-generate the shuffle files
URL: https://github.com/apache/spark/pull/24110#discussion_r272801872
##########
File path: core/src/main/scala/org/apache/spark/scheduler/ShuffleMapStage.scala
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@@ -87,10 +87,23 @@ private[spark] class ShuffleMapStage(
*/
def isAvailable: Boolean = numAvailableOutputs == numPartitions
- /** Returns the sequence of partition ids that are missing (i.e. needs to be
computed). */
+ /**
+ * Returns the sequence of partition ids that are missing (i.e. needs to be
computed).
+ * If the current stage is indeterminate, missing partition is all
partitions every time.
+ */
override def findMissingPartitions(): Seq[Int] = {
mapOutputTrackerMaster
.findMissingPartitions(shuffleDep.shuffleId)
.getOrElse(0 until numPartitions)
}
+
+ /**
+ * Clear the intermediate status including shuffle status and indeterminate
attempt id for
+ * shuffle map stage.
+ */
+ override def clearIntermediateState(): Unit = {
+ if (isIndeterminate) {
+ mapOutputTrackerMaster.unregisterAllMapOutput(shuffleDep.shuffleId)
Review comment:
No problem.
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