Getting exception ClassNotFound akka.remote.RemoteRefProvider

[aditya shrotri]

Hi

I am trying to communicate between remote actors. My program run fine from eclipse but I am unable to run it from command prompt.

I am getting following exception

java.lang.ClassNotFoundException: akka.remote.RemoteActorRefProvider

        at java.net.URLClassLoader$1.run(URLClassLoader.java:202)

        at java.security.AccessController.doPrivileged(Native Method)

        at java.net.URLClassLoader.findClass(URLClassLoader.java:190)

        at java.lang.ClassLoader.loadClass(ClassLoader.java:306)

        at java.lang.ClassLoader.loadClass(ClassLoader.java:247)

        at java.lang.Class.forName0(Native Method)

        at java.lang.Class.forName(Class.java:247)

        at akka.actor.ReflectiveDynamicAccess$$anonfun$getClassFor$1.apply(Dynam

icAccess.scala:68)

        at akka.actor.ReflectiveDynamicAccess$$anonfun$getClassFor$1.apply(Dynam

icAccess.scala:67)

        at scala.util.Try$.apply(Try.scala:161)

        at akka.actor.ReflectiveDynamicAccess.getClassFor(DynamicAccess.scala:67

)

        at akka.actor.ReflectiveDynamicAccess.createInstanceFor(DynamicAccess.sc

ala:85)

        at akka.actor.ActorSystemImpl.<init>(ActorSystem.scala:546)

        at akka.actor.ActorSystem$.apply(ActorSystem.scala:111)

        at akka.actor.ActorSystem$.apply(ActorSystem.scala:93)

        at Project1Bonus2$.main(Project1Bonus2.scala:11)

        at Project1Bonus2.main(Project1Bonus2.scala)

        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.

java:39)

        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces

sorImpl.java:25)

        at java.lang.reflect.Method.invoke(Method.java:597)

        at scala.tools.nsc.util.ScalaClassLoader$$anonfun$run$1.apply(ScalaClass

Loader.scala:71)

        at scala.tools.nsc.util.ScalaClassLoader$class.asContext(ScalaClassLoade

r.scala:31)

        at scala.tools.nsc.util.ScalaClassLoader$URLClassLoader.asContext(ScalaC

lassLoader.scala:139)

        at scala.tools.nsc.util.ScalaClassLoader$class.run(ScalaClassLoader.scal

a:71)

        at scala.tools.nsc.util.ScalaClassLoader$URLClassLoader.run(ScalaClassLo

ader.scala:139)

        at scala.tools.nsc.CommonRunner$class.run(ObjectRunner.scala:28)

        at scala.tools.nsc.ObjectRunner$.run(ObjectRunner.scala:45)

        at scala.tools.nsc.CommonRunner$class.runAndCatch(ObjectRunner.scala:35)

        at scala.tools.nsc.ObjectRunner$.runAndCatch(ObjectRunner.scala:45)

        at scala.tools.nsc.MainGenericRunner.runTarget$1(MainGenericRunner.scala

:74)

        at scala.tools.nsc.MainGenericRunner.process(MainGenericRunner.scala:96)

        at scala.tools.nsc.MainGenericRunner$.main(MainGenericRunner.scala:105)

        at scala.tools.nsc.MainGenericRunner.main(MainGenericRunner.scala)

and my application conf is 

akka { actor { provider = "akka.remote.RemoteActorRefProvider" } remote { enabled-transports = ["akka.remote.netty.tcp"] netty.tcp { hostname = "127.0.0.1" port = 9001 } } }

I have tried to include akka-remote.jar in classpath but still getting the same error.

Any help would be appreciated.

[√iktor Ҡlang]

Hi Aditya,

You need to make sure that akka-remote is on your classpath, please refer to the documentation of your tooling s how to achieve that.

Cheers,

√

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[aditya shrotri]

Hi 

I have akka-remote in my classpath. 

I also tried to load config from application.conf and from code using ConfigFactory.load, still getting same exception.

I am compiling the code like

scalac -cp akka-remote_2.10-2.2.2.jar Filename.scala

and for running,

scala FileName

and my code is compiling very well and I have put application.conf in the same folder.

I get the exception while running the code from command line.

Aditya

[√iktor Ҡlang]

Hi,

On Sun, Sep 15, 2013 at 11:34 PM, aditya shrotri <adis...@gmail.com> wrote:

Hi 

I have akka-remote in my classpath. 

If you did, you wouldn't get that exception.

 

I also tried to load config from application.conf and from code using ConfigFactory.load, still getting same exception.

I am compiling the code like

scalac -cp akka-remote_2.10-2.2.2.jar Filename.scala

and for running,

scala FileName

you are not passing in akka-remote to the scala command. Please refer to the documentation of the "scala" script.

Cheers,

√

[aditya shrotri]

Hi Victor,

I have tried now,

scala -cp akka-remote_2.10-2.2.2.jar FileName

but still getting the same exception.

Aditya

[aditya shrotri]

If I remove the remoteProvider and run it with remote dependancies, it runs fine.

Aditya

[Roland Kuhn]

Hi Aditya,

16 sep 2013 kl. 00:23 skrev aditya shrotri:

Hi Victor,

I have tried now,

scala -cp akka-remote_2.10-2.2.2.jar FileName

You need a lot more JARs than this one; I would definitely recommend that you use a build tool which supports dependency management (sbt, maven, … )

Regards,

Roland

Dr. Roland Kuhn
Akka Tech Lead
Typesafe – Reactive apps on the JVM.
twitter: @rolandkuhn

[Akka Team]

Hi Aditya,

scala -cp akka-remote_2.10-2.2.2.jar FileName

Shouldn't that be 2.2.1? There is no 2.2.2 released so far.

-Endre

--

Akka Team

Typesafe - The software stack for applications that scale

Blog: letitcrash.com
Twitter: @akkateam

[aditya shrotri]

Thanks guys,

Problem solved when I used sbt. it seems it requires many Jar files than akka-remote.jar.

,

A