zhijiangW commented on pull request #11687:
URL: https://github.com/apache/flink/pull/11687#issuecomment-625718773


   Thanks for quick review @pnowojski ! 
   
   Considering the issue of `requestPartition` in 
`AbstractRecordReader#getNextRecord`
   > Not sensitive for batch 
   
   I mean the batch job might not be such performance sensitive compared with 
streaming mode, furthermore we also had this action long time ago without 
mailbox model if I remembered correctly. I can double check whether this action 
can be done only once in different code paths.


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