akkaResolveone.scala

// works perfectly in amm
import $ivy.`com.typesafe.akka::akka-actor:2.4.11`,akka.actor._, scala.concurrent._, scala.concurrent.duration._
val system = ActorSystem("hoge")
class PrintActor(dummy: String) extends Actor{ def receive = { case msg => println(msg) } }
val a = system.actorOf(Props(classOf[PrintActor],"first"),"aaa")
val b = system.actorOf(Props(classOf[PrintActor],"second"),"bbb") 
Await.result(system.actorSelection("/user/aaa").resolveOne(1.second), 1.second)
{
  def findRef(path: String): Option[ActorRef] =
    try {
      Some(Await.result(system.actorSelection(s"/user/$path").resolveOne(1.second), 1.second))
    } catch {
      case ex: Throwable => None
    }
}
findRef("aaa")
findRef("bbb")