Github user jinxing64 commented on the issue: https://github.com/apache/spark/pull/22202 Thanks for ping~ Seems that `ShuffleMapTask0.1` is a speculation, please update the description. The change seems fine for me. But give https://github.com/apache/spark/pull/21019, the issue in description is already solved. I think this change is a refine work for https://github.com/apache/spark/pull/21019. Fine for me. But we should always be careful when touching such core logic
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