Github user xuanyuanking commented on the issue:
https://github.com/apache/spark/pull/20930
@Ngone51 Thanks for your review.
> Does stage 2 is correspond to the never success stage in PR description ?
Stage 3 is the never success stage, stage 2 is its parent stage.
> So, why stage 2 retry 4 times when there's no more missing tasks?
Stage 2 retry 4 times triggered by Stage 3's fetch failed event. Actually
in this scenario, stage 3 will always failed by fetch fail.
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