Github user vanzin commented on a diff in the pull request: https://github.com/apache/spark/pull/20807#discussion_r174965182 --- Diff: resource-managers/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala --- @@ -497,6 +500,8 @@ private[spark] class ApplicationMaster(args: ApplicationMasterArguments) extends // if the user app did not create a SparkContext. throw new IllegalStateException("User did not initialize spark context!") } + // After initialisation notify user class thread to continue --- End diff -- nit: rest of the code uses American spelling ("initialization"), so this should be consistent.
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