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

    https://github.com/apache/spark/pull/20519#discussion_r167015747
  
    --- Diff: python/pyspark/daemon.py ---
    @@ -177,4 +183,24 @@ def handle_sigterm(*args):
     
     
     if __name__ == '__main__':
    -    manager()
    +    if len(sys.argv) < 2:
    +        print >> sys.stderr, "No parent port number specified"
    +        sys.exit(1)
    +    try:
    +        parent_port = int(sys.argv[1])
    +    except ValueError:
    +        print >> sys.stderr, "Non-numeric port number specified:", 
sys.argv[1]
    --- End diff --
    
    I don't think this syntax works with python 3.


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