s0nskar opened a new pull request, #3675:
URL: https://github.com/apache/celeborn/pull/3675

   …upt shuffle
   
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   ### What changes were proposed in this pull request?
   
   Fix backward compatibility issue with interrupt shuffle by checking if the 
reason is nonEmpty.
   
   ### Why are the changes needed?
   
   If someone uses a new client with old server which is not sending 
`CheckQuotaResponse` in `HeartbeatFromApplicationResponse` then proto uses 
default value to build CheckQuotaResponse with isAvailable=false and reason="". 
In this case the job will always fails without breaching the quota, we should 
not fail the job if the reason is empty to make it backward compatible.
   
   ### Does this PR resolve a correctness bug?
   
   <!-- Yes/No. (Note: If yes, committer will add `correctness` label to 
current pull request). -->
   
   No
   
   ### Does this PR introduce _any_ user-facing change?
   
   No
   
   ### How was this patch tested?
   
   Tested in local setup.


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