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我在 Scalatra 中有一些使用 Atmosphere 框架的代码，这些代码在发出 Web 请求后不断导致系统崩溃。控制台显示从服务器发送到客户端的数据，但紧接着总是出现以下错误：

Uncaught error from thread [default-akka.actor.default-dispatcher-11] shutting down JVM since 'akka.jvm-exit-on-fatal-error' is enabled for ActorSystem[default]
java.lang.NoSuchMethodError: akka.actor.ActorSystem.dispatcher()Lakka/dispatch/MessageDispatcher;
    at org.scalatra.atmosphere.package$.jucFuture2akkaFuture(package.scala:29)
    at org.scalatra.atmosphere.ScalatraBroadcaster.broadcast(ScalatraBroadcaster.scala:19)

我正在使用调度在 m 个演员中发出网络请求。但是当我使用喷雾时，我得到了同样的信息。

这是我提出网络请求的方式：

Http(Req(_.setUrl(fullUrl))) map {response =>

但是在数据发送到客户端之后会发生错误（您可以在堆栈跟踪中看到对“广播”的调用。所以我认为这不是网络请求。

My project build file:

 lazy val project = Project (
    "",
    file("."),
    settings = Defaults.defaultSettings ++ ScalatraPlugin.scalatraWithJRebel ++ scalateSettings ++ assemblySettings ++ Seq(
      organization := Organization,
      name := Name,
      version := Version,
      scalaVersion := ScalaVersion,
      resolvers += Classpaths.typesafeReleases,
      test in assembly := {},
      jarName in assembly := "",
      mergeStrategy in assembly <<= (mergeStrategy in assembly) { (old) =>
        {
          case PathList(xs) if xs.equals("about.html") => MergeStrategy.first
          case x => old(x)
        }
      },
      libraryDependencies ++= Seq(
        "org.scalatra" %% "scalatra" % ScalatraVersion,
        "org.scalatra" %% "scalatra-scalate" % ScalatraVersion,
        "org.scalatra" %% "scalatra-specs2" % ScalatraVersion % "test",
        "ch.qos.logback" % "logback-classic" % "1.0.6" % "runtime",
        "org.eclipse.jetty" % "jetty-webapp" % "8.1.8.v20121106" % "container;compile",
        "org.eclipse.jetty.orbit" % "javax.servlet" % "3.0.0.v201112011016" % "container;provided;test;compile" artifacts (Artifact("javax.servlet", "jar", "jar")),
        "org.scalatra" %% "scalatra-atmosphere" % "2.2.1",
        "org.scalatra" %% "scalatra-json" % "2.2.1",
        "org.json4s"   %% "json4s-jackson" % "3.2.4",
        "org.eclipse.jetty" % "jetty-websocket" % "8.1.10.v20130312" % "container;compile",
        "org.scalatest" % "scalatest_2.10" % "2.0.M6-SNAP17",
        "com.typesafe.akka" % "akka-testkit_2.10" % "2.2.0",
        "joda-time" % "joda-time" % "2.3",
        "com.github.nscala-time" %% "nscala-time" % "0.6.0",
        "com.cloudphysics" % "jerkson_2.10" % "0.6.3",
          "net.databinder.dispatch" %% "dispatch-core" % "0.11.0"

我查看了 scalatra 的源代码，似乎是未来的代码正在爆炸。我正在使用以下执行上下文，这可能是相关的：

implicit val ec: ExecutionContext = context.dispatcher
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1 回答 1

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I'm going to take a guess here and say that you are pulling in two versions of the akka-actor jar. You explicitly referencing akka-testkit is going to pull in the akka-actor 2.2.0 jar. I'm guessing that something else (maybe scalatra atmosphere) is also pulling in akka-actor and not the 2.2.0 version. You should check your classpath and see if you indeed to have two versions of akka-actor

于 2013-09-05T21:23:13.950 回答