Github user pwendell commented on the pull request:
https://github.com/apache/spark/pull/1124#issuecomment-46530379
@mengxr I think the scenario is where people have set SPARK_JAVA_OPTS in
`spark-env` and copied this to all of the nodes. In that case, the
configuration will be correctly observed by the actor system in
`CoarseGrainedExectorBackend`.
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