LiuGuH commented on PR #6502:
URL: https://github.com/apache/hadoop/pull/6502#issuecomment-2017106408

   Thanks for review.  @zhangshuyan0  
   The solution may be happened with datanodes that have heavy load IO.  But 
the unit test case I can not reproduce. It has no relation with 
DFS_DATANODE_MAX_RECEIVER_THREADS_KEY. 
   
   With datanodes that have heavy load IO,  in.close() and out.close() may  be 
also throw IOException when close() is invoked and the socket may be not really 
closed.
   
   


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