Github user tgravescs commented on the issue: https://github.com/apache/spark/pull/22112 yeah that doesn't reproduce it, you really need a fetch failure in there and would think some kind of randomness or order in the map output, I've started to try to write something to reproduce but haven't been successful yet. I ran a few larger jobs just to make sure they didn't have issues. Due to holiday, it probably won't be until tuesday before I can get back to it. If others have reviewed sufficiently we don't have to wait on me for that testing. I also haven't seen response form @cloud-fan on if he did any other manual testing. If anyone has reproducible case please share
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