Question

我正在尝试使用AKKA在我的localhost上运行远程actor，但每次我都会收到此错误。它说遇到死信。我在互联网上搜索，发现当演员在线程停止后收到消息时会出现此错误。所以我正在寻找一种让演员在远程机器上保持活力的方法。我使用的是akka演员而不是scala演员。

[INFO] [09/16/2013 18:44:51.426] [run-main] [Remoting] Starting remoting

[INFO] [09/16/2013 18:44:51.688] [run-main] [Remoting] Remoting started; listening on      addresses :[akka.tcp://actorSystem1@localhost:2209]

[INFO] [09/16/2013 18:44:51.759] [actorSystem2-akka.actor.default-dispatcher-5] [akka://actorSystem2/deadLetters] Message [java.lang.String] from 

Actor[akka://actorSystem2/deadLetters] to Actor[akka://actorSystem2/deadLetters] was not delivered. [1] **dead letters encountered**. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'.

以下是代码。

import akka.actor.{Actor, Props, ActorSystem}
import com.typesafe.config.ConfigFactory
import akka.remote._

object MyApp extends App {
 val actorSystem1 = ActorSystem("actorSystem1", ConfigFactory.parseString("""
    akka {
       actor {
           provider = "akka.remote.RemoteActorRefProvider"
             }
       remote {
           transport = ["akka.remote.netty.tcp"]
       netty.tcp {
           hostname = "localhost"
           port = 2209
                 }
             }
        }
   """))


  val actorSystem2 = ActorSystem("actorSystem2")


actorSystem1.actorOf(Props(new Actor {
def receive = {
  case x: String =>
    Thread.sleep(1000)
    println("RECEIVED MESSAGE: " + x)
               } }), "simplisticActor")



    val remoteActor = actorSystem2.actorFor("akka://actorSystem1@localhost:2209/user/simplisticActor")

  remoteActor ! "TEST 1"
  remoteActor ! "TEST 2"



  Thread.sleep(1000)

  actorSystem1.shutdown()
  actorSystem2.shutdown()
 }

提前致谢。

Answer 1

我认为我发现您的代码存在一些问题，可能会导致出现问题。首先，如果您打算将远程系统上的演员从actorSystem2查找到actorSystem1，那么您仍然需要为actorSystem1设置远程属性，更具体地说，您需要确保它使用RemoteActorRefProvider。如果不这样做，系统2将无法在系统1中查找远程actor。一旦进行了此更改，我还将更改远程actor查找：

val remoteActor = actorSystem2.actorFor("akka://actorSystem1@localhost:2209/user/simplisticActor")

为：

val remoteActor = actorSystem2.actorSelection("akka.tcp://actorSystem1@localhost:2209/user/simplisticActor")

{@ 1}}方法已被弃用，我认为您还没有查看actorFor协议的.tcp部分来查找远程操作符。

进行这些更改，然后查看是否适合您。

运行AKKA远程演员时出现“Dead Letters遇到”错误

1 个答案: