Github user mateiz commented on the pull request:
https://github.com/apache/spark/pull/941#issuecomment-44910461
What is the difference between Popen and check_output? Will the Popen hide
error codes? We should make sure this doesn't break behavior, and ideally use
the same code for both 2.6 and 2.7 if Popen always works.
Also, was this the only change needed for Python 2.6?
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