Failed to serialize remote message

Akka
,
1

I am trying to migrate Akka from 2.4.1 to 2.6.19 during this migration I am facing some serialization issues as follows.

akka.remote.MessageSerializer$SerializationException: Failed to serialize remote message [class akka.actor.ActorSelectionMessage] using serializer [class akka.remote.serialization.MessageContainerSerializer].
	at akka.remote.MessageSerializer$.serialize(MessageSerializer.scala:66)
	at akka.remote.EndpointWriter.$anonfun$serializeMessage$1(Endpoint.scala:1035)
	at scala.util.DynamicVariable.withValue(DynamicVariable.scala:59)
	at akka.remote.EndpointWriter.serializeMessage(Endpoint.scala:1035)
	at akka.remote.EndpointWriter.writeSend(Endpoint.scala:895)
	at akka.remote.EndpointWriter$$anonfun$4.applyOrElse(Endpoint.scala:867)
	at akka.actor.Actor.aroundReceive(Actor.scala:537)
	at akka.actor.Actor.aroundReceive$(Actor.scala:535)
	at akka.remote.EndpointActor.aroundReceive(Endpoint.scala:540)
	at akka.actor.ActorCell.receiveMessage(ActorCell.scala:580)
	at akka.actor.ActorCell.invoke(ActorCell.scala:548)
	at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:270)
	at akka.dispatch.Mailbox.run(Mailbox.scala:231)
	at akka.dispatch.Mailbox.exec(Mailbox.scala:243)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1016)
	at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1665)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1598)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183)
Caused by: akka.serialization.DisabledJavaSerializer$JavaSerializationException: Attempted to serialize message using Java serialization while `akka.actor.allow-java-serialization` was disabled. Check WARNING logs for more details.

My current configuration is as follows.

akka {
	actor {
		provider = "akka.remote.RemoteActorRefProvider"
		warn-about-java-serializer-usage = true
		enable-additional-serialization-bindings = on
		serialize-messages = on
              ....

		serializers {
			proto = "akka.remote.serialization.ProtobufSerializer"
		}

		serialization-bindings {
		    "java.io.Serializable" = none
        	"com.google.protobuf.Message" = proto
        }
	}

	remote {
		artery.enabled = false
		classic {
             enabled-transports = ["akka.remote.classic.netty.tcp"]
             netty.tcp {
                 hostname = "127.0.0.1"
                 port = 2552
             } 
        }
    }
}
2

I think you are trying to serialize a messag with Java serialization and that is disabled in 2.6. It’s sent via actorSelection.

Have you tried serialize-messages = off ?
That is only a trsting utility, which I would recommend against using.

3

Yes serialize-messages = on is just for testing locally. I have tried by disabling this as well.