cloud-fan commented on a change in pull request #25620: [SPARK-25341][Core]
Support rolling back a shuffle map stage and re-generate the shuffle files
URL: https://github.com/apache/spark/pull/25620#discussion_r325272960
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File path: core/src/main/scala/org/apache/spark/MapOutputTracker.scala
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@@ -88,23 +88,23 @@ private class ShuffleStatus(numPartitions: Int) {
* Register a map output. If there is already a registered location for the
map output then it
* will be replaced by the new location.
*/
- def addMapOutput(mapId: Int, status: MapStatus): Unit = synchronized {
- if (mapStatuses(mapId) == null) {
+ def addMapOutput(mapIndex: Int, status: MapStatus): Unit = synchronized {
Review comment:
This is a place that I think `mapIndex` makes sense.
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