Github user jodersky commented on a diff in the pull request: https://github.com/apache/spark/pull/11113#discussion_r52214846 --- Diff: examples/src/main/scala/org/apache/spark/examples/streaming/ActorWordCount.scala --- @@ -63,11 +63,11 @@ class FeederActor extends Actor { def receive: Receive = { case SubscribeReceiver(receiverActor: ActorRef) => println("received subscribe from %s".format(receiverActor.toString)) - receivers = LinkedList(receiverActor) ++ receivers + receiverActor +=: receivers case UnsubscribeReceiver(receiverActor: ActorRef) => println("received unsubscribe from %s".format(receiverActor.toString)) - receivers = receivers.dropWhile(x => x eq receiverActor) + receivers.dropWhile(x => x eq receiverActor) --- End diff -- Unfortunately, this does actually not remove the elements from the original receivers (instead it creates a new ArrayBuffer without the given elements). Please look at my previous comment, maybe a Set is better suited here
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