NoClassDefFoundError for akka actor when using akka-persistence-redis

[Dai Yinhua]

Hi team,

Is any one using akka-persistence-redis, I have encountered below exception when I was trying to use akka-persistence-redis 0.6.

Uncaught error from thread [RTAPCluster-akka.persistence.dispatchers.default-plugin-dispatcher-17] shutting down JVM since 'akka.jvm-exit-on-fatal-error' is enabled for ActorSystem[RTAPCluster]

java.lang.NoClassDefFoundError: akka/actor/Actor$class

at com.hootsuite.akka.persistence.redis.snapshot.RedisSnapshotStore.<init>(RedisSnapshotStore.scala:16)

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

at java.lang.reflect.Constructor.newInstance(Constructor.java:423)

at java.lang.Class.newInstance(Class.java:442)

at akka.util.Reflect$.instantiate(Reflect.scala:44)

at akka.actor.NoArgsReflectConstructor.produce(IndirectActorProducer.scala:105)

at akka.actor.Props.newActor(Props.scala:213)

at akka.actor.ActorCell.newActor(ActorCell.scala:562)

at akka.actor.ActorCell.create(ActorCell.scala:588)

at akka.actor.ActorCell.invokeAll$1(ActorCell.scala:461)

at akka.actor.ActorCell.systemInvoke(ActorCell.scala:483)

at akka.dispatch.Mailbox.processAllSystemMessages(Mailbox.scala:282)

at akka.dispatch.Mailbox.run(Mailbox.scala:223)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

at java.lang.Thread.run(Thread.java:745)

Caused by: java.lang.ClassNotFoundException: akka.actor.Actor$class

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)

... 18 more

I can confirm the akka actor is included to the project, and it is running ok when I switch to level db.

I noticed that akka-persistence-redis V0.6 is using rediscala V1.6, which then depends on akka V2.3.6, but I would like to use akka V2.4.12, so I exclude the akka dependency from the dependency of akka-persistence-redis, not sure if this is the reason.

Related part of my pom.xml is as below:

<dependencyManagement>

  <dependencies>

  <dependency>

  <groupId>com.typesafe.akka</groupId>

  <artifactId>akka-actor_2.12</artifactId>

  <version>2.4.12</version>

  </dependency>

  </dependencies>

  </dependencyManagement>

<dependencies>

...

<dependency>

 <groupId>com.hootsuite</groupId>

 <artifactId>akka-persistence-redis_2.11</artifactId>

 <version>0.6.0</version>

 <exclusions>

  <exclusion>

  <groupId>com.typesafe.akka</groupId>

  <artifactId>akka-actor_2.11</artifactId>

  </exclusion>

  <exclusion>

  <groupId>com.typesafe.akka</groupId>

  <artifactId>akka-persistence_2.11</artifactId>

  </exclusion>

  <exclusion>

  <groupId>com.typesafe.akka</groupId>

  <artifactId>akka-remote_2.11</artifactId>

  </exclusion>

  <exclusion>

  <groupId>com.typesafe.akka</groupId>

  <artifactId>akka-contrib_2.11</artifactId>

  </exclusion>

 </exclusions>

</dependency>

...

</dependencies>

[Patrik Nordwall]

You can't mix versions that were built with Scala 2.11 and 2.12.

akka-actor_2.12 vs akka-persistence-redis_2.11

I suggest that you help the maintainers of akka-persistence-redis to update to latest Akka and Scala versions.

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Patrik Nordwall
Akka Tech Lead
Lightbend -  Reactive apps on the JVM
Twitter: @patriknw

[Dai Yinhua]

Hi Patrik,

Get it, thank you for your response.

[Steve Song]

We released v0.7 today that supports Scala 2.12 and Akka 2.4.12. Let me know if you run into issues with the release.

Steve

On Tuesday, February 14, 2017 at 11:30:02 PM UTC-8, Dai Yinhua wrote:

Hi Patrik,

Get it, thank you for your response.

id: 7898659753248090

[Dai Yinhua]

Awesome, I will try it, thank you.