java.lang.NoClassDefFoundError: akka/actor/ActorRefFactory

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  1. 0

    Akka-Http 2.4.9 throws java.lang.NoClassDefFoundError: akka/actor/ActorRefFactory exception

    Stack Overflow | 7 months ago | Steffen Schmitz
    java.lang.NoClassDefFoundError: akka/actor/ActorRefFactory
  2. 0
    samebug tip
    This exception normally means you either have to add the said class to your dependencies or you miswrote it. Look in the documentation of your library how to add it as a dependency.
  3. 0
    samebug tip
    If you're using Hibernate, this indicates you're missing FasterXML Classmate dependency, which you can add with the following: <groupId>com.fasterxml</groupId> <artifactId>classmate</artifactId> <version>1.0</version>
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  5. 0
    samebug tip
    This was caused by a failure to instantiate Kafka broker. Check your dependencies.
  6. 0
    samebug tip
    NoClassDefFoundError means java has failed to find a class you're trying to instantiate, look if you've added the class you're trying to instantiate to the dependencies.

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Root Cause Analysis

  1. java.lang.ClassNotFoundException

  2. Java RT
    2. java.lang.ClassLoader.loadClass(
    3. sun.misc.Launcher$AppClassLoader.loadClass(
    4. java.lang.ClassLoader.loadClass(
    4 frames
  3. Unknown
    1. WebServer.main(WebServer.scala)
    1 frame