guoweiM commented on pull request #6613:
URL: https://github.com/apache/flink/pull/6613#issuecomment-698073535


   Sorry for the late reply. Thanks @lvhuyen very much for resolving the 
comments.
   
   What I concern is that why we need `globalModificationTime` and 
`maxProcessedTime` at the same time. Actually we could always compute the 
`globalModificationTime` from the `maxProcessedTime`. IMHO reducing the mutable 
states  would make the code better maintenance and understanding.
   
   Of course maybe I miss some scenario which needs the two states. So would 
you like to enlighten me why we still need these two variables at the same time.
   
   Thanks again for your patience.


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