Github user jiangxb1987 commented on the issue:
https://github.com/apache/spark/pull/20414
@mridulm I also agree we should follow @sameeragarwal 's suggestion to let
shuffle fetch produce deterministic output, and only do this for a few
operations (e.g. repartition/zipWithIndex, do we have more?) IIUC spill should
NOT affect the result, but if you find any suspects, please kindly share them
with us. :)
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