davidradl commented on PR #26903:
URL: https://github.com/apache/flink/pull/26903#issuecomment-3187936584

   @weiqingy this is a nice addition. I wondered can we say what state is not 
compatible between v1 and v2. I suspect it should work apart from serializing 
state that involves:
   - some / all custom serializers  
   - Scala Case Class datatype
   - POJOs using Kryo
   - General Class Types using Kryo 
   
   Anything else we should add to the list? If this is the case it would really 
useful to document these restrictions to help Flink users know if there are 
likely to hit migration issues or not. 
   
   
   
   
   


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