Github user Ngone51 commented on the issue: https://github.com/apache/spark/pull/20930 Hi, @xuanyuanking , I'm still confused (smile & cry). > 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. Stage 2 has no missing tasks, right? So, there's no missing partitions for Stage 2 (which means Stage 3 can always get Stage 2's MapOutputs from `MapOutputTrackerMaster` ), right? So, why Stage 3 will always failed by FetchFail? Hope you can explain more. Thank you very much!
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