wankunde opened a new pull request #28921:
URL: https://github.com/apache/spark/pull/28921


   ### What changes were proposed in this pull request?
   
   Bug fix for yarn Dynamic Resource Allocation.
   
   ### Why are the changes needed?
   
   There are some exceptions when RemoveBroadcast RPC are called from 
BlockManagerMaster to BlockManagers on executors.
   
   It seems that `blockManagerInfo.values` in `BlockManagerMaster` has not been 
updated after the executor is closed
   
   ### Does this PR introduce _any_ user-facing change?
   
   No
   
   ### How was this patch tested?
   Using Exists patch
   


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