Github user pwendell commented on the pull request:
https://github.com/apache/spark/pull/755#issuecomment-45031538
The tests here are failing because the output of `collect` is not
guaranteed to have a sort order. In other pyspark tests they just sort the
output.
e.g. https://github.com/apache/spark/blob/master/python/pyspark/rdd.py#L254
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