xuanyuanking commented on issue #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#issuecomment-532122570 As the discussion with @cloud-fan, we will keep `mapId` as the only name for end-users, the related classes include FetchFailedException, Shuffle related public API and shuffle block id. For internal Spark, we use `mapTaskId` and `mapIndex` for precise naming. This work is done in 2f72ecb.
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