Github user JoshRosen commented on a diff in the pull request:

    https://github.com/apache/spark/pull/1503#discussion_r15620649
  
    --- Diff: core/src/main/scala/org/apache/spark/api/python/PythonRDD.scala 
---
    @@ -614,7 +625,6 @@ private class PythonAccumulatorParam(@transient 
serverHost: String, serverPort:
           if (byteRead == -1) {
             throw new SparkException("EOF reached before Python server 
acknowledged")
           }
    -      socket.close()
    --- End diff --
    
    I guess this socket will be closed when it's garbage-collected?  There's 
only one of these sockets per Python SparkContext, so this shouldn't cause 
problems.


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