rdblue edited a comment on issue #1438:
URL: https://github.com/apache/iceberg/issues/1438#issuecomment-693014457


   @stevenzwu, I meant across versions, not within a running application. I'm 
concerned about cases where Iceberg is upgraded and can no longer read older 
state. I thought that was limited to checkpoint state, but there appears to be 
a second case.
   
   Is the second case a rolling deployment? That would make sense and would be 
a problem when updating Iceberg for many more classes than just checkpoint 
state.


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