creating actor in Test file throws ActorInitializationException

[Adrian M]

Hi,
I have some testcases in a project which I moved to another project (along with their dependencies).
The testcases are not working anymore because every time I create an actor I get this exception:
How can I make this exception go away?

[akka://ClusterSystem/user/$$a] Could not instantiate Actor
Make sure Actor is NOT defined inside a class/trait,
if so put it outside the class/trait, f.e. in a companion object,
OR try to change: 'actorOf(Props[MyActor]' to 'actorOf(Props(new MyActor)'.
akka.actor.ActorInitializationException: exception during creation
        at akka.actor.ActorInitializationException$.apply(Actor.scala:218)
        at akka.actor.ActorCell.create(ActorCell.scala:578)
        at akka.actor.ActorCell.invokeAll$1(ActorCell.scala:425)
        at akka.actor.ActorCell.systemInvoke(ActorCell.scala:447)
        at akka.dispatch.Mailbox.processAllSystemMessages(Mailbox.scala:262)
        at akka.testkit.CallingThreadDispatcher.process$1(CallingThreadDispatche
r.scala:244)
        at akka.testkit.CallingThreadDispatcher.runQueue(CallingThreadDispatcher
.scala:284)
        at akka.testkit.CallingThreadDispatcher.register(CallingThreadDispatcher
.scala:153)
        at akka.dispatch.MessageDispatcher.attach(AbstractDispatcher.scala:133)
        at akka.actor.dungeon.Dispatch$class.start(Dispatch.scala:84)
        at akka.actor.ActorCell.start(ActorCell.scala:338)
        at akka.testkit.TestActorRef.<init>(TestActorRef.scala:50)
        at akka.testkit.TestActorRef$.apply(TestActorRef.scala:141)
        at akka.testkit.TestActorRef$.apply(TestActorRef.scala:137)
        at akka.testkit.TestActorRef$.apply(TestActorRef.scala:146)
        at akka.testkit.TestActorRef$.apply(TestActorRef.scala:144)
        at test.scala.SvcsServicesTests$$anonfun$1.apply$mcV$sp(SvcsServicesTest
s.scala:305)
        at test.scala.SvcsServicesTests$$anonfun$1.apply(SvcsServicesTests.scala
:303)
        at test.scala.SvcsServicesTests$$anonfun$1.apply(SvcsServicesTests.scala
:303)
        at org.scalatest.FlatSpec$$anon$1.apply(FlatSpec.scala:3062)
        at org.scalatest.Suite$class.withFixture(Suite.scala:1099)
        at test.scala.SvcsServicesTests.withFixture(SvcsServicesTests.scala:31)
        at org.scalatest.FlatSpec$class.invokeWithFixture$1(FlatSpec.scala:3059)

        at org.scalatest.FlatSpec$$anonfun$runTest$1.apply(FlatSpec.scala:3071)
        at org.scalatest.FlatSpec$$anonfun$runTest$1.apply(FlatSpec.scala:3071)
        at org.scalatest.SuperEngine.runTestImpl(Engine.scala:234)
        at org.scalatest.FlatSpec$class.runTest(FlatSpec.scala:3071)
        at test.scala.SvcsServicesTests.runTest(SvcsServicesTests.scala:31)
        at org.scalatest.FlatSpec$$anonfun$runTests$1.apply(FlatSpec.scala:3129)
        at org.scalatest.FlatSpec$$anonfun$runTests$1.apply(FlatSpec.scala:3129)

        at org.scalatest.SuperEngine$$anonfun$traverseSubNodes$1$1.apply(Engine.
scala:330)
        at org.scalatest.SuperEngine$$anonfun$traverseSubNodes$1$1.apply(Engine.
scala:318)
        at scala.collection.immutable.List.foreach(List.scala:318)
        at org.scalatest.SuperEngine.traverseSubNodes$1(Engine.scala:318)
        at org.scalatest.SuperEngine.org$scalatest$SuperEngine$$runTestsInBranch
(Engine.scala:309)
        at org.scalatest.SuperEngine$$anonfun$traverseSubNodes$1$1.apply(Engine.
scala:338)
        at org.scalatest.SuperEngine$$anonfun$traverseSubNodes$1$1.apply(Engine.
scala:318)
        at scala.collection.immutable.List.foreach(List.scala:318)
        at org.scalatest.SuperEngine.traverseSubNodes$1(Engine.scala:318)
        at org.scalatest.SuperEngine.org$scalatest$SuperEngine$$runTestsInBranch
(Engine.scala:313)
        at org.scalatest.SuperEngine.runTestsImpl(Engine.scala:394)
        at org.scalatest.FlatSpec$class.runTests(FlatSpec.scala:3129)
        at test.scala.SvcsServicesTests.runTests(SvcsServicesTests.scala:31)
        at org.scalatest.Suite$class.run(Suite.scala:1426)
        at test.scala.SvcsServicesTests.org$scalatest$FlatSpec$$super$run(SvcsSe
rvicesTests.scala:31)
        at org.scalatest.FlatSpec$$anonfun$run$1.apply(FlatSpec.scala:3175)
        at org.scalatest.FlatSpec$$anonfun$run$1.apply(FlatSpec.scala:3175)
        at org.scalatest.SuperEngine.runImpl(Engine.scala:430)
        at org.scalatest.FlatSpec$class.run(FlatSpec.scala:3175)
        at test.scala.SvcsServicesTests.run(SvcsServicesTests.scala:31)
        at org.scalatest.tools.ScalaTestFramework$ScalaTestRunner.run(ScalaTestF
ramework.scala:267)
        at org.scalatools.testing.Runner2.run(Runner2.java:16)
        at sbt.TestRunner.delegateRun(TestFramework.scala:57)
        at sbt.TestRunner.run(TestFramework.scala:51)
        at sbt.TestRunner.runTest$1(TestFramework.scala:71)
        at sbt.TestRunner.run(TestFramework.scala:80)
        at sbt.TestFramework$$anonfun$9$$anonfun$apply$9$$anonfun$10$$anonfun$ap
ply$10.apply(TestFramework.scala:188)
        at sbt.TestFramework$$anonfun$9$$anonfun$apply$9$$anonfun$10$$anonfun$ap
ply$10.apply(TestFramework.scala:188)
        at sbt.TestFramework$.sbt$TestFramework$$withContextLoader(TestFramework
.scala:200)
        at sbt.TestFramework$$anonfun$9$$anonfun$apply$9$$anonfun$10.apply(TestF
ramework.scala:188)
        at sbt.TestFramework$$anonfun$9$$anonfun$apply$9$$anonfun$10.apply(TestF
ramework.scala:188)
        at sbt.Tests$$anonfun$makeSerial$1$$anonfun$apply$8.apply(Tests.scala:12
1)
        at sbt.Tests$$anonfun$makeSerial$1$$anonfun$apply$8.apply(Tests.scala:12
1)
        at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike
.scala:233)
        at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike
.scala:233)
        at scala.collection.LinearSeqOptimized$class.foreach(LinearSeqOptimized.
scala:59)
        at scala.collection.immutable.List.foreach(List.scala:76)
        at scala.collection.TraversableLike$class.map(TraversableLike.scala:233)

        at scala.collection.immutable.List.map(List.scala:76)
        at sbt.Tests$$anonfun$makeSerial$1.apply(Tests.scala:121)
        at sbt.Tests$$anonfun$makeSerial$1.apply(Tests.scala:121)
        at sbt.std.Transform$$anon$3$$anonfun$apply$2.apply(System.scala:47)
        at sbt.std.Transform$$anon$3$$anonfun$apply$2.apply(System.scala:47)
        at sbt.std.Transform$$anon$5.work(System.scala:71)
        at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:23
2)
        at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:23
2)
        at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:18)
        at sbt.Execute.work(Execute.scala:238)
        at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:232)
        at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:232)
        at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestric
tions.scala:160)
        at sbt.CompletionService$$anon$2.call(CompletionService.scala:30)
        at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
        at java.util.concurrent.FutureTask.run(Unknown Source)
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
        at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
        at java.util.concurrent.FutureTask.run(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source
)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
Caused by: akka.actor.ActorInitializationException: Could not instantiate Actor


My test file in path services/src/main/test/scala is:

package test.scala

import svcs.testing.actors._
import com.verticalscope.forum.BBCodeToHtmlTransform
import org.scalatest.FlatSpec
import org.scalatest.matchers.ShouldMatchers
import org.scalatest.verb._
import akka.actor.PoisonPill
import akka.actor.{PoisonPill, ActorSystem, Props, Actor}
import akka.actor.{Kill, Props}
import akka.cluster.ClusterEvent.{CurrentClusterState, MemberUp}

import concurrent.duration._
import org.scalatest.FlatSpec
import org.scalatest.matchers.{MustMatchers, ShouldMatchers}
import akka.actor._
import akka.testkit.TestActorRef
import akka.testkit._

import akka.testkit.TestKit._
import com.verticalscope.services.Messages.RemoveService
import com.typesafe.config.ConfigFactory

class SvcsServicesTests extends FlatSpec /*with AkkaSpec */with ShouldMatchers with MustMatchers /*with ImplicitSender*/ {
  val shutdownTime= 1000 milliseconds


 "Client subscribed to service - first client on, then server on" should "register w each other" in { //within(20 seconds) {
  implicit val system= ActorSystem("ClusterSystem")
    val testClientRef= TestActorRef[TestClient]      //<--exception
    val testClient= testClientRef.underlyingActor  
    testClient.servicesSubscription must equal(Map())
    Thread.sleep(2000)

    val testServer= TestActorRef[TestServer]   //<--exception
    Thread.sleep(2000)

    println(" ActorEquality: "+testServer + " === "+testClient.servicesSubscription.get(testClient.servicesNeeded.toList(0)).get.find(sp=>sp.actor==testServer).get.actor)
    testServer must equal( testClient.servicesSubscription.get(testClient.servicesNeeded.toList(0)).get.find(sp=>sp.actor==testServer).get.actor)
    shutdownActorSystem(system, shutdownTime, false)

    //shutdownActorSystem(system, shutdownTime, false)
  }


}


I declare the actors used in another file in the same test folder: services/src/main/test/scala

package svcs.testing.actors
import com.verticalscope.services.{ServiceProviderTrait, MessageAckServicesTrait, ClientTrait}

  class TestClient extends MessageAckServicesTrait with ClientTrait {
    override def servicesNeeded= Set("serviceY")
  }
  class TestServer extends MessageAckServicesTrait with ServiceProviderTrait {
    val serverName="server"
    override var serviceName ="serviceY"
  }

[Akka Team]

Hi Adrian,

On Tue, Sep 17, 2013 at 7:26 PM, Adrian M <eamo...@gmail.com> wrote:

Hi,
I have some testcases in a project which I moved to another project (along with their dependencies).
The testcases are not working anymore because every time I create an actor I get this exception:
How can I make this exception go away?

[akka://ClusterSystem/user/$$a] Could not instantiate Actor
Make sure Actor is NOT defined inside a class/trait,
if so put it outside the class/trait, f.e. in a companion object,
OR try to change: 'actorOf(Props[MyActor]' to 'actorOf(Props(new MyActor)'.
akka.actor.ActorInitializationException: exception during creation
        at akka.actor.ActorInitializationException$.apply(Actor.scala:218)

I declare the actors used in another file in the same test folder: services/src/main/test/scala

package svcs.testing.actors
import com.verticalscope.services.{ServiceProviderTrait, MessageAckServicesTrait, ClientTrait}

  class TestClient extends MessageAckServicesTrait with ClientTrait {
    override def servicesNeeded= Set("serviceY")
  }
  class TestServer extends MessageAckServicesTrait with ServiceProviderTrait {
    val serverName="server"
    override var serviceName ="serviceY"
  }

Are TestClient and TestServer declared in an enclosing class/trait/object? Looking at the indentation in your snippet it might be the case.

-Endre

 

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[Adrian M]

Hi,
Well ... yes and no. I have client and server traits which I extend in TestClient and TestServer as shown here: class TestClient extends MessageAckServicesTrait with ClientTrait { .. }

The issue is that I can run this in another project fine. But copying the tests to another project throws the actor initialization error.

I tried to have the test class do "extends TestKit(ActorSystem("testSystem"))" in the hopes that it would use that actor system, but this didn't help.

Any clues?

[Akka Team]

Hi Adrian,

without the full exception (i.e. including the cause) there is not much I can tell you; does the class extend Actor? 

Regards,

Roland