[GitHub] spark pull request #16429: [SPARK-19019][PYTHON] Fix hijacked `collections.n...

[azmras <gi...@git.apache.org>]

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

    https://github.com/apache/spark/pull/16429#discussion_r94367710
  
    --- Diff: python/pyspark/serializers.py ---
    @@ -382,18 +382,30 @@ def _hijack_namedtuple():
             return
     
         global _old_namedtuple  # or it will put in closure
    +    global _old_namedtuple_kwdefaults  # or it will put in closure too
     
         def _copy_func(f):
             return types.FunctionType(f.__code__, f.__globals__, f.__name__,
                                       f.__defaults__, f.__closure__)
     
    +    def _kwdefaults(f):
    +        kargs = getattr(f, "__kwdefaults__", None)
    --- End diff --
    
    after applying patch can you try to run 
    sc.parallelize(range(100), 8)
    and confirm that it is working, because it is not...
    and serialisation of objects goes crazy.. 
    
    Thanks for your efforts


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