Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/6083#discussion_r30165277
--- Diff:
yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala ---
@@ -573,10 +573,16 @@ object ApplicationMaster extends Logging {
}
private[spark] def sparkContextInitialized(sc: SparkContext): Unit = {
+ if (master == null){
--- End diff --
Yes, you could reach this, but the NPE at that point was just a side effect
of a different bug. Fix that bug, NPE is gone. Remove the NPE, but leave the
bug in, something else will blow up.
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