Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/3233#discussion_r24306049
--- Diff:
yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala ---
@@ -453,12 +453,24 @@ private[spark] class ApplicationMaster(
private def startUserApplication(): Thread = {
logInfo("Starting the user application in a separate Thread")
System.setProperty("spark.executor.instances",
args.numExecutors.toString)
+
+ val classpath = Client.getUserClasspath(null, sparkConf)
+ val urls = classpath.map { entry =>
+ new URL("file:" + new File(entry.getPath()).getAbsolutePath())
+ }
+ val userClassLoader =
+ if (Client.isUserClassPathFirst(sparkConf, true)) {
+ new ChildFirstURLClassLoader(urls,
Utils.getContextOrSparkClassLoader)
+ } else {
+ new MutableURLClassLoader(urls, Utils.getContextOrSparkClassLoader)
+ }
--- End diff --
can we add a short comment that explains this is doing the user class path
first thing
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