I am trying to build a simple web service with Akka-http. I followed this guide: http://doc.akka.io/docs/akka/2.4.9/scala/http/low-level-server-side-api.html and everything works fine, when I run sbt run.
When I execute java -jar PROJECT.jar it returns:
Exception in thread "main" java.lang.NoClassDefFoundError: akka/actor/ActorRefFactory at WebServer.main(WebServer.scala) Caused by: java.lang.ClassNotFoundException: akka.actor.ActorRefFactory at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 1 more My build.sbt:
name := "APPNAME" version := "0.0.1" scalaVersion := "2.11.8" artifactName := { (sv: ScalaVersion, module: ModuleID, artifact: Artifact) => artifact.name + "-" + module.revision + "." + artifact.extension } libraryDependencies ++= Seq( "com.typesafe.akka" %% "akka-http-core" % "2.4.9" ) And my Main object:
import akka.actor.ActorSystem import akka.http.scaladsl.Http import akka.http.scaladsl.model.HttpMethods._ import akka.http.scaladsl.model._ import akka.stream.ActorMaterializer import scala.io.StdIn object WebServer { def main(args: Array[String]) { implicit val system = ActorSystem("APPNAME") implicit val materializer = ActorMaterializer() implicit val executionContext = system.dispatcher val requestHandler: HttpRequest => HttpResponse = { case HttpRequest(GET, Uri.Path("/"), _, _, _) => { HttpResponse(entity = HttpEntity( ContentTypes.`text/html(UTF-8)`, "<html><body>Hello world!</body></html>") ) } case HttpRequest(GET, Uri.Path("/crash"), _, _, _) => { sys.error("BOOM!") } case r: HttpRequest => { r.discardEntityBytes() // important to drain incoming HTTP Entity stream HttpResponse(404, entity = "Unknown resource!") } } val bindingFuture = Http().bindAndHandleSync(requestHandler, "localhost", 8080) println(s"Server online at http://localhost:8080/\nPress RETURN to stop...") StdIn.readLine() // let it run until user presses return bindingFuture .flatMap(_.unbind()) // trigger unbinding from the port .onComplete(_ => system.terminate()) // and shutdown when done } } I already found java.lang.NoSuchMethodError: akka.actor.ActorCell.addFunctionRef and https://github.com/sbt/sbt-assembly/issues/204 but deleting the Akka-Actor in my scala lib folder hasn't helped. I also tried Adding akka-actor as dependency in the same version as akka-http.