Github user jinxing64 commented on the issue: https://github.com/apache/spark/pull/17634 @jiangxb1987 Thank you so much taking time looking into this. Yes, it is not failing in existing code. But I think it's quite straightforward that partitioner should be compatible with num of child RDD's partitions, right? In #17533, I have to query the `MapStatus` based on the correctness of partitioner(i.e. num of partitions). That's why I proposed this. Thanks again taking time reviewing this :) ð
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