Github user xuanyuanking commented on the issue:
https://github.com/apache/spark/pull/20930
Stage 0\1\2\3 same with 20\21\22\23 in this screenshot, stage2's shuffleId
is 1 but stage3's is 0 can't happen.
Good description for the scenario, can't get a FetchFailed because we can
get the MapStatus, but get a 'null'. If I'm not mistaken, this also because the
ExecutorLost trigger `removeOutputsOnExecutor`.
Happy to discuss with all guys and sorry for can't giving more detailed log
after checking the root case, this happened in Baidu online env and can't keep
all logs for 1 month. I'll keep fixing the case and catching details log as
mush as possible.
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