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patriknw avatar patriknw commented on May 26, 2024

Thanks for reporting. That is interesting, since 2.4-M1 is supposed to be compatible and I don't think I use any akka internals here.

Do you see any exceptions in the log?

I will investigate.

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He-Pin avatar He-Pin commented on May 26, 2024

after I clone your code,update the dependence to akka 2.4-M1,do clean and test,all test passed.
so maybe I just need a recompile.

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He-Pin avatar He-Pin commented on May 26, 2024

maybe cause is the change of making ActorPath to AbstractPath for the static forward.

[JVM-2]   java.lang.IncompatibleClassChangeError: Found class akka.actor.ActorPath, but interface was expected
[JVM-2]   at akka.remote.RemoteActorRefProvider.init(RemoteActorRefProvider.scala:167)
[JVM-2]   at akka.cluster.ClusterActorRefProvider.init(ClusterActorRefProvider.scala:30)
[JVM-2]   at akka.actor.ActorSystemImpl.liftedTree2$1(ActorSystem.scala:663)
[JVM-2]   at akka.actor.ActorSystemImpl._start$lzycompute(ActorSystem.scala:660)
[JVM-2]   at akka.actor.ActorSystemImpl._start(ActorSystem.scala:660)
[JVM-2]   at akka.actor.ActorSystemImpl.start(ActorSystem.scala:676)
[JVM-2]   at akka.actor.ActorSystem$.apply(ActorSystem.scala:143)
[JVM-2]   at akka.actor.ActorSystem$.apply(ActorSystem.scala:120)
[JVM-2]   at akka.remote.testkit.MultiNodeSpec.<init>(MultiNodeSpec.scala:252)
[JVM-2]   at akka.contrib.datareplication.ReplicatorChaosSpec.<init>(ReplicatorChaosSpec.scala:40)

after I recompile it works.

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patriknw avatar patriknw commented on May 26, 2024

Excellent, then we have an issue with the binary compatibility. Thanks again.

cc @rkuhn

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He-Pin avatar He-Pin commented on May 26, 2024

I copy your code to my project,and recompile it,drop the dependency of the release,it works.
And there is no such an exception rise in when run it,maybe we should log something here:
https://github.com/akka/akka/blob/master/akka-actor/src/main/scala/akka/actor/ActorSystem.scala#L671

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patriknw avatar patriknw commented on May 26, 2024

yeah, recompilation solves it, but the goal with binary compatibility is that a library like this should work without recompilation.

In this case ActorPath was changed from a trait to an abstract class, and we thought that would be alright, but obviously it was not.

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rkuhn avatar rkuhn commented on May 26, 2024

Okay, we’ll need to revert that change, then, and add the static forwarders elsewhere, e.g. in ActorPaths.

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He-Pin avatar He-Pin commented on May 26, 2024

yes,ActorPaths is pretty fine.

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patriknw avatar patriknw commented on May 26, 2024

I confirm that the issue is real. I get this exception:

java.lang.IncompatibleClassChangeError: Found class akka.actor.ActorPath, but interface was expected
    at akka.contrib.datareplication.Replicator.isLocalSender(Replicator.scala:811)
    at akka.contrib.datareplication.Replicator$$anonfun$1.applyOrElse(Replicator.scala:759)
    at akka.actor.Actor$class.aroundReceive(Actor.scala:475)
    at akka.contrib.datareplication.Replicator.aroundReceive(Replicator.scala:687)
    at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516)
    at akka.actor.ActorCell.invoke(ActorCell.scala:487)
    at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:256)
    at akka.dispatch.Mailbox.run(Mailbox.scala:223)
    at akka.dispatch.Mailbox.exec(Mailbox.scala:233)
    at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
    at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
    at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
    at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)

The offending line in the Replicator:

def isLocalSender(): Boolean = !sender().path.address.hasGlobalScope

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patriknw avatar patriknw commented on May 26, 2024

Closing this here, since it is tracked in akka/akka#17606

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