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

    https://github.com/apache/spark/pull/17671#discussion_r154892410
  
    --- Diff: python/pyspark/worker.py ---
    @@ -160,6 +166,24 @@ def read_udfs(pickleSer, infile, eval_type):
     
     
     def main(infile, outfile):
    +    if raven:
    --- End diff --
    
    Ah, I get your point. Well, indeed, it's possible to move that branch into 
the `except Exception` branch. In the end, if exception happens, pyspark worker 
will get terminated, so raven client is for one time usage and no need to keep 
it around all the time.


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