AngersZhuuuu commented on pull request #28032:
URL: https://github.com/apache/spark/pull/28032#issuecomment-643930675


   > @wangyum Thanks for your response. If the incoming data is not even 
distributed by the repartitioning key, wouldn't this strategy create issues 
when there is skew in the data ? i.e we may end up with potentially very large 
partitions ?
   
   +1 for this concern , maybe we should add an adaptive procedure to adjust 
the number of partitions for the large partition key value. 


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