luoyuxia commented on PR #21257:
URL: https://github.com/apache/flink/pull/21257#issuecomment-1366633565

   > @beyond1920 Thanks for reviewing. I prefer to append a commit with tests 
to mock the speculative execution to validate these operators.
   
   Actaully, I don't think we need to add tests to mock peculative execution 
for the test will be just like create multiple operators and make operator to 
process element and make sure it'll generate different paths for different 
attempts.
   Do you think we still need to add these test. @beyond1920 


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