错误：java.lang.NoClassDefFoundError:akka/util/Timeout答案

【问题标题】：Error : java.lang.NoClassDefFoundError: akka/util/Timeout错误：java.lang.NoClassDefFoundError:akka/util/Timeout
【发布时间】：2016-10-14 10:35:44
【问题描述】：

我想使用 spray.io 创建一个 API，我会遵循 https://danielasfregola.com/2015/02/23/how-to-build-a-rest-api-with-spray/ 的每条指令

之后，这是我的代码

package API.Configurations

import java.io.File

import com.typesafe.config.ConfigFactory
import akka.io.IO
import spray.can.Http
import akka.pattern.ask
import akka.util.Timeout
import scala.concurrent.duration._
import akka.actor.{ActorSystem, Props}

object MainServices
  extends App
{
  val configFile = new File("/home/ubuntu/conf/application.conf")

  val getPortMYSQL = ConfigFactory.parseFile(configFile).getInt("port")
  val getAddressMYSQL = ConfigFactory.parseFile(configFile).getString("address")
  val getUsernameMYSQL = ConfigFactory.parseFile(configFile).getString("username")
  val getPasswordMYSQL = ConfigFactory.parseFile(configFile).getString("password")

  val getPortAPI = ConfigFactory.parseFile(configFile).getInt("port_api")
  val getAddressAPI = ConfigFactory.parseFile(configFile).getString("address_api")

  val getPortES = ConfigFactory.parseFile(configFile).getInt("port_es")
  val getAddressES = ConfigFactory.parseFile(configFile).getString("address_es")
  val getclusterNameES = ConfigFactory.parseFile(configFile).getString("clusterNameES")

  implicit val system = ActorSystem("BRISK_API")
  val service = system.actorOf(Props[ServicesControllers], "CONFIGURATION_BRISK_API")

    import scala.concurrent.duration._
    implicit val askTimeout = new Timeout(5.seconds)

 // implicit val timeout = Timeout(5.seconds)
  IO(Http) ? Http.Bind(service, interface = getAddressAPI, port = getPortAPI)

  println(s"Detil Services MYSQL : Port = ${getPortMYSQL}, Address = ${getAddressMYSQL}, Username = ${getUsernameMYSQL}, Password = ${getPasswordMYSQL}")
  println(s"Detil Services API : Port = ${getPortAPI}, Address = ${getAddressAPI}")
  println(s"Detil Services ES : Port = ${getPortES}, Address = ${getAddressES}, ClusterName = ${getclusterNameES}")
}

当我尝试使用脚本时：sbt run，我得到了错误。编译器说：

[error] (run-main-0) java.lang.NoClassDefFoundError: akka/util/Timeout
java.lang.NoClassDefFoundError: akka/util/Timeout
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
    at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
    at java.lang.Class.getMethod0(Class.java:3018)
    at java.lang.Class.getMethod(Class.java:1784)
Caused by: java.lang.ClassNotFoundException: akka.util.Timeout
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
    at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
    at java.lang.Class.getMethod0(Class.java:3018)
    at java.lang.Class.getMethod(Class.java:1784)
[trace] Stack trace suppressed: run last compile:run for the full output.
java.lang.RuntimeException: Nonzero exit code: 1
    at scala.sys.package$.error(package.scala:27)
[trace] Stack trace suppressed: run last compile:run for the full output.
[error] (compile:run) Nonzero exit code: 1
[error] Total time: 0 s, completed Oct 14, 2016 5:33:23 PM

总是在 akka/util/timeout，知道如何处理这个问题吗？谢谢。

编辑 1：我是从那些链接跟踪的，但结果仍然和以前一样。 Play 2.5 with Akka - could not find implicit value for parameter timeout: akka.util.Timeout

编辑 2：我的 build.sbt

name := "SBTSR2016"

version := "1.0"
mainClass in Compile := Some("API.Configurations.MainServices")

scalaVersion := "2.10.5"

assemblyMergeStrategy in assembly := {
  case PathList("META-INF", xs @ _*) => MergeStrategy.discard
  case x => MergeStrategy.first
}

resolvers += "spray repo" at "http://repo.spray.io"
resolvers += "spray nightlies repo" at "http://nightlies.spray.io"

libraryDependencies += "io.spray" % "spray-json_2.10" % "1.3.2"  % "provided"
libraryDependencies += "io.spray" % "spray-can_2.10" % "1.3.2" % "provided"
libraryDependencies += "io.spray" % "spray-client_2.10" % "1.3.2" % "provided"
libraryDependencies += "io.spray" % "spray-testkit_2.10" % "1.3.2" % "provided"
//libraryDependencies += "io.spray" % "spray-routing_2.10" % "1.3.2" % "provided"
libraryDependencies += "io.spray" % "spray-http_2.10" % "1.3.2" % "provided"
libraryDependencies += "io.spray" % "spray-httpx_2.10" % "1.3.2" % "provided"
libraryDependencies += "mysql" % "mysql-connector-java" % "5.1.12" % "provided"
libraryDependencies += "org.elasticsearch" % "elasticsearch" % "2.3.1" % "provided"
libraryDependencies += "com.sksamuel.elastic4s" % "elastic4s-streams_2.10" % "2.3.1" % "provided"
//libraryDependencies += "org.elasticsearch" % "elasticsearch" % "1.3.2"
libraryDependencies +=  "org.elasticsearch" % "elasticsearch-mapper-attachments" % "2.3.1" % "provided"
libraryDependencies += "com.typesafe" % "config" % "1.2.1" % "provided"
libraryDependencies += "io.spray" % "spray-routing-shapeless2_2.10" % "1.3.2"
//libraryDependencies += "com.typesafe.akka" % "akka-actor_2.10" % "2.3.4" % "provided"
libraryDependencies += "com.typesafe.akka" % "akka-actor_2.10" % "2.3.1" % "provided"

【问题讨论】：

请问您使用的是哪个IDE？查看 jar 以及是否包含依赖库。如果不是这样，你应该看看你是如何告诉 sbt 把它们放进去的。我用 intellij 自己创建了 jars，并且用 sbt 运行效果很好。
我正在使用 IDE intellij idea。我应该在哪里看罐子？ @sascha10000
aaw 抱歉，没有正确查看您的构建。我正在查看第一个链接，她在那里声明和要导出的 jar。因此，我认为你也这样做。就您使用 intellij 而言，看看您是否可以在依赖项中找到 Timeout 类。有时我在导入库时遇到了困难，但没有明确的解决办法。
你有没有试过通过intellij“右键单击main-obj”->“运行”来运行它。如果它有效，则您的构建文件存在一些问题。不客气。
不，我没有。但是在阅读了您的回复后，它可以工作。它认为您可能是对的，我的构建文件有问题。 :( 任何想法，哪一个？

标签： scala api

【解决方案1】：

在 build.sbt 处，在下面添加一些代码：

mergeStrategy in assembly := {
 case m if m.toLowerCase.endsWith("manifest.mf") => MergeStrategy.discard
 case m if m.toLowerCase.matches("meta-inf.*\\.sf$") => MergeStrategy.discard
 case "reference.conf" => MergeStrategy.concat
 case _ => MergeStrategy.first
}

它对我有用。
参考链接：https://blog.knoldus.com/2015/07/20/spark-with-spray-starter-kit/comment-page-1/

【讨论】：