wuyi created SPARK-31034:
----------------------------

             Summary: ShuffleBlockFetcherIterator may can't create request for 
last group
                 Key: SPARK-31034
                 URL: https://issues.apache.org/jira/browse/SPARK-31034
             Project: Spark
          Issue Type: Bug
          Components: Spark Core
    Affects Versions: 3.0.0
            Reporter: wuyi


When the size of all blocks is less than targetRemoteRequestSize and the size 
of last block group is less than maxBlocksInFlightPerAddress, 
ShuffleBlockFetcherIterator will not create a request for the last group.



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