holdenk opened a new pull request #30046:
URL: https://github.com/apache/spark/pull/30046


   ### What changes were proposed in this pull request?
   
   If a block is removed between discovery to transfer fo the block, we short 
circuit that block and remove it from the list to transfer and increment the 
transferred blocks. This is complicated since both RPC errors and local read 
errors may be reported with the same exception class.
   
   ### Why are the changes needed?
   
   Slow shuffle refreshes could waste time when decommissioning has already 
finished. Decommissioning might avoid transferring some some blocks to an 
otherwise live host which is marked as "full" if a deleted block fails to 
transfer to that host.
   
   
   ### Does this PR introduce _any_ user-facing change?
   
   No.
   
   ### How was this patch tested?
   
   New unit and integration tests.


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