Github user kiszk commented on a diff in the pull request:
https://github.com/apache/spark/pull/21758#discussion_r204232986
--- Diff: core/src/main/scala/org/apache/spark/MapOutputTracker.scala ---
@@ -434,6 +434,18 @@ private[spark] class MapOutputTrackerMaster(
}
}
+ /** Unregister all map output information of the given shuffle. */
+ def unregisterAllMapOutput(shuffleId: Int) {
+ shuffleStatuses.get(shuffleId) match {
+ case Some(shuffleStatus) =>
+ shuffleStatus.removeOutputsByFilter(x => true)
+ incrementEpoch()
+ case None =>
+ throw new SparkException(
+ s"unregisterAllMapOutput called for nonexistent shuffle ID
${shuffleId}.")
--- End diff --
nit: `${shuffleId}` -> `$shuffleId`
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