Github user tgravescs commented on a diff in the pull request:
https://github.com/apache/spark/pull/11603#discussion_r55525828
--- Diff: yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala ---
@@ -454,10 +478,16 @@ private[spark] class Client(
* (3) whether to add these resources to the classpath
*/
val cachedSecondaryJarLinks = ListBuffer.empty[String]
+ val files = sparkConf.get(FILES_TO_DISTRIBUTE).map(p =>
Utils.resolveURIs(p))
+ .orElse(sys.env.get("SPARK_YARN_DIST_FILES"))
--- End diff --
No as I pointed out the other jira SPARK-3374 was proposing to remove.
There might be some internal env variables used just to communicate between
Client and AM but anything external can be removed for 2.x
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