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在spark-shell中输入范例中的代码：

import akka.actor.Actorimport akka.actor.Propsimport akka.event.Logging class MyActor extends Actor {  val log = Logging(context.system, this)  def receive = {    case "test" ⇒ log.info("received test")    case _      ⇒ log.info("received unknown message")  }}val system = ActorSystem("MySystem")  val myActor = system.actorOf(Props[MyActor], name = "myactor")

scala>   val myActor = system.actorOf(Props[MyActor], name = "myactor")java.lang.IllegalArgumentException: no matching constructor found on class $iwC$$iwC$$iwC$$iwC$MyActor for arguments []	at akka.util.Reflect$.error$1(Reflect.scala:81)	at akka.util.Reflect$.findConstructor(Reflect.scala:93)	at akka.actor.Props.constructor(Props.scala:194)	at akka.actor.Props.
   
    (Props.scala:213)	at akka.actor.Props$.apply(Props.scala:69)	at $iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC.
    
     (
     
      :24)
     
    
   

stackoverflow里面是这么解释的：

Take this example:

class A{
     class B{}}

I can do new A, but new B will return an error. I have to do:

val a = new Aval b = new a.B

That's why akka failed to create this actor.

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