scala – 在优雅停止后不能总是重用Actor的名字

应用程序显示http://doc.akka.io/docs/akka/snapshot/scala/actors.html#Graceful_Stop中提到的“Graceful Stop”
并不总是保证您可以重复使用正常停止的Actor名称.

偶尔会出现以下异常：

Exception in thread "main" akka.actor.InvalidActorNameException: actor name [DummyActor] is not unique!

这是为什么？如何修复应用程序,以便InvalidActorNameExceptions不会偶尔出现？

这是代码：

主要班级……

import akka.actor._
import akka.pattern.gracefulStop
import DummyActor.Stop
import DummyActor

import scala.concurrent.duration._
import scala.concurrent.{Await,Future}

object AkkaTest {
  def main(args: Array[String]) {

    val actorsystem = ActorSystem("testSystem")

    1 to 5 foreach { _ =>

      // Create an actor with name: DummyActor
      val dummyActor = actorsystem.actorOf(Props[DummyActor],"DummyActor")

      // Gracefully stop the DummyActor
      val stopped: Future[Boolean] = gracefulStop(dummyActor,5 seconds,Stop)
      Await.result(stopped,6 seconds)
    }

    val terminated: Future[Terminated] = actorsystem.terminate()
    Await.result(terminated,10 seconds)

    System.out.println("Finished successfully. Try again,eventually it will fail. You can also increase the amount of loops.")
  }
}

和演员……

import akka.actor.Actor
import DummyActor.Stop

object DummyActor {
  case object Stop
}

class DummyActor extends Actor {

  override def receive: Receive = {
    case Stop => context stop self
  }

}

我有Scala 2.11.7和Java 8和Akka 2.4.0.