Github user StephanEwen commented on a diff in the pull request: https://github.com/apache/flink/pull/394#discussion_r24693247 --- Diff: flink-runtime/src/test/java/org/apache/flink/runtime/taskmanager/TaskManagerTest.java --- @@ -486,7 +489,8 @@ protected void run() { public void onReceive(Object message) throws Exception { if(message instanceof RegistrationMessages.RegisterTaskManager){ final InstanceID iid = new InstanceID(); - getSender().tell(new RegistrationMessages.AcknowledgeRegistration(iid, -1), + getSender().tell(new RegistrationMessages.AcknowledgeRegistration(iid, -1, + Option.<ActorRef>apply(null)), --- End diff -- I think that `apply(null)` is actually a `Some`, not a `None`.
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