Github user megatron-me-uk commented on the pull request:
https://github.com/apache/spark/pull/6262#issuecomment-103462427
I believe that this change will bring pyspark more in line with the
operation of the scala implementation.
See:
https://github.com/apache/spark/blob/4ce2782a61e23ed0326faac2ee97a9bd36ec8963/core/src/main/scala/org/apache/spark/rdd/PipedRDD.scala#L161
In scala, the output of an external command is read from stdout until EOF.
Then the exit status is checked. If exitStatus is not Zero an Exception is
thrown.
Here, I have implemented the same behaviour in python.
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