[GitHub] [spark] dongjoon-hyun commented on a change in pull request #24519: [SPARK-27612][PYTHON] Use Python's default protocol instead of highest protocol

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dongjoon-hyun commented on a change in pull request #24519: [SPARK-27612][PYTHON] Use Python's default protocol instead of highest protocol
URL: https://github.com/apache/spark/pull/24519#discussion_r280655697
 
 

 ##########
 File path: python/pyspark/serializers.py
 ##########
 @@ -62,11 +62,12 @@
 if sys.version < '3':
     import cPickle as pickle
     from itertools import izip as zip, imap as map
+    pickle_protocol = 2
 else:
     import pickle
     basestring = unicode = str
     xrange = range
-pickle_protocol = pickle.HIGHEST_PROTOCOL
+    pickle_protocol = 3
 
 Review comment:
   It looks nice and solid.

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