Github user sun-rui commented on the pull request:
https://github.com/apache/spark/pull/9179#issuecomment-149757394
@felixcheung, you are correct, the value of PYSPARK_PYTHON is passed to
workers. In sparkR, "spark.sparkr.r.command" is a spark conf option, and will
be passed to workers. They are passed to worker in different ways.
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