消息以死信队列结束

Question

我有以下代码

  @Override
  public void onReceive(Object msg) throws Exception {
    if (msg instanceof newRequest) {

      ActorRef childRouter =
          getContext()
              .actorOf(
                  new SmallestMailboxPool(actorPoolSize)
                      .props(Props.create(ChildActor.class, param)),
                  "childActor");
      childActor.tell(new someOtherMessage(), getSelf());
    }

当收到newRequest消息时，它会被处理，但是子actor从不接收someOtherMessage()，someOtherMessage总是在deadltter队列中结束。我做错了什么？