Github user jinxing64 commented on the issue:
https://github.com/apache/spark/pull/16620
@squito
Thanks a lot for your comments, they are very helpful. I've already refined
the code, please take another look : )
When handle `Success` of `ShuffleMapTask`, what I want to do is to check
whether there is some tasks running for some other partitions, if so, do not
resubmit if `pendingPartitions.isEmpty && !stage.isAvailable`. there are two
benefits for this:
1. Success of the running tasks have chance to update mapstatus to
`ShuffleMapStage`, and turn it to be available;
2. Avoid submitting conflicting `taskSet`
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