Akka 来自默认dispatcher的未捕获错误导致JavaTestKit出现致命错误

我只是被阿克卡弄湿了脚。我正试图使用此Maven依赖项中的JavaTestKit编写JUNit测试：

    <dependency>
        <groupId>com.typesafe.akka</groupId>
        <artifactId>akka-actor_2.10</artifactId>
        <version>2.3.12</version>
    </dependency>
    <dependency>
        <groupId>com.typesafe.akka</groupId>
        <artifactId>akka-testkit_2.11</artifactId>
        <version>2.3.12</version>
    </dependency>

例外情况如下：

[ERROR] [08/20/2015 07:55:10.614] [default-akka.actor.default-dispatcher-4] [ActorSystem(default)] Uncaught error from thread [default-akka.actor.default-dispatcher-4] shutting down JVM since 'akka.jvm-exit-on-fatal-error' is enabled
java.lang.NoSuchMethodError: scala.Predef$.ArrowAssoc(Ljava/lang/Object;)Ljava/lang/Object;
    at akka.testkit.CallingThreadDispatcherQueues.registerQueue(CallingThreadDispatcher.scala:64)
    at akka.testkit.CallingThreadMailbox$$anon$1.initialValue(CallingThreadDispatcher.scala:318)
    at akka.testkit.CallingThreadMailbox$$anon$1.initialValue(CallingThreadDispatcher.scala:315)
    at java.lang.ThreadLocal.setInitialValue(ThreadLocal.java:180)
    at java.lang.ThreadLocal.get(ThreadLocal.java:170)
    ...

---

我使用的是默认配置。我还需要为JavaTestKit设置其他东西才能按预期工作吗？

我解决了这个问题。这与Akka和Testkit库的不兼容组合有关（Scala 2.10 vs 2.11）。以下Maven依赖项按预期工作：

    <dependency>
        <groupId>com.typesafe.akka</groupId>
        <artifactId>akka-actor_2.10</artifactId>
        <version>2.3.12</version>
    </dependency>
    <dependency>
        <groupId>com.typesafe.akka</groupId>
        <artifactId>akka-testkit_2.10</artifactId>
        <version>2.3.12</version>
    </dependency>
    <dependency>
        <groupId>org.scala-lang</groupId>
        <artifactId>scala-library</artifactId>
        <version>2.10.5</version>
    </dependency>

com.typesafe.akka
akka-actor_2.10
2.3.12
com.typesafe.akka
akka-testkit_2.10
2.3.12
org.scala-lang
scala图书馆
2.10.5

    <dependency>
        <groupId>com.typesafe.akka</groupId>
        <artifactId>akka-actor_2.10</artifactId>
        <version>2.3.12</version>
    </dependency>
    <dependency>
        <groupId>com.typesafe.akka</groupId>
        <artifactId>akka-testkit_2.10</artifactId>
        <version>2.3.12</version>
    </dependency>
    <dependency>
        <groupId>org.scala-lang</groupId>
        <artifactId>scala-library</artifactId>
        <version>2.10.5</version>
    </dependency>