Github user JoshRosen commented on the pull request:
https://github.com/apache/spark/pull/1969#issuecomment-52342115
There was a bunch of prior discussion about this in an old pull request for
[SPARK-1110](http://issues.apache.org/jira/browse/SPARK-1110) (I'd link to it,
but it's from the now-deleted `incubator-spark` GitHub repo).
I think we decided that it didn't make sense for workers to inherit
`SPARK_HOME` from the driver; there were some later patches that removed this
dependency, if I recall.
@iven Was this pull request motivated by an issue that you saw when
deploying Spark? Which version were you using, and on what platform?
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