guoweiM commented on pull request #12132:
URL: https://github.com/apache/flink/pull/12132#issuecomment-629650094


   Hi, @aljoscha thanks for your suggestion.
   1. yes you are right I should delete the v1 code in the test.
   1. The reason I used Operator to generate snapshots at the time is that we 
could use a set of code to generate both v1 and v2 snapshots of `BucketState`.
       1. Otherwise, you need to write twice for how to generate 
`BucketStatev1` and `BucketStateV2`. 
       1. There is a special process also need to write twice. The path in the 
snapshot cannot have an absolute path and needs to be specially processed when 
the snapshot is generated.
   
   


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