Github user sryza commented on a diff in the pull request:
https://github.com/apache/spark/pull/3233#discussion_r23805531
--- Diff: yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala ---
@@ -760,7 +756,13 @@ object Client extends Logging {
/**
* Populate the classpath entry in the given environment map.
- * This includes the user jar, Spark jar, and any extra application jars.
+ *
+ * User jars are generally not added to the JVM's classpath; those are
handled by the AM and
--- End diff --
Are we going to extra pains to support spark.yarn.user.classpath.first
here? If so, I think we should just drop support for it, because it was never
documented in the first place.
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