Github user vanzin commented on the pull request: https://github.com/apache/spark/pull/3409#issuecomment-65138030 @zhzhan I guess my main confusion is why do you need to add user-visible options for that instead of just automatically propagating these properties somehow? Users do not need to set these properties today, so this would be a usability regression if these properties are actually needed on the AM side. Also, it's always weird to talk about "the AM" since there are two different modes that behave differently (client mode, where the AM is mostly doing not much, and cluster, where the usual `spark.driver.*` options apply to the AM).
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