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_r319502863
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File path: core/src/main/scala/org/apache/spark/scheduler/MapStatus.scala
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@@ -100,16 +108,19 @@ private[spark] object MapStatus {
*
* @param loc location where the task is being executed.
* @param compressedSizes size of the blocks, indexed by reduce partition id.
+ * @param mapTaskId unique task id for the task
Review comment:
let's call it `mapId`
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