Wildfly 10 Remote EJB "Failed to marshal EJB parameters" error due to " java.io.NotSerializableException: org.jboss.resteasy.client.jaxrs.engines.ApacheHttpClient4Engine$1"

[mbaranski]

I have an EJB with a remote interface:

@Stateless

@Remote(ActorProvider.class)

public class ActorServiceClient implements ActorProvider { ... }

@Remote

public interface ActorProvider { ... }

The implementation (ActorServiceClient) is a REST client calling a remote REST service. I am injecting the client into a service EJB like so:

@Stateless

public class DataResource {

       private static final Logger L = LoggerFactory.getLogger(DataResource.class);
   @EJB
   ActorProvider actorProvider;
..
}

Whenever I call the actorProvider.getProfile(String someString) method from the DataResource class, I get the exception saying "Failed to marshal EJB parameters" and the serialization error.  The parameter is serializable (it's a String) and the response is serializable (this works if the EJB is not a remote invocation).

Why is this happening?

[wdfink]

If you call it local, by default the setting is optimized to call-by-reference even if you use the Remote interface.

So I suppose the response (as the parameter is a String) contains variables which are not Serializable even if the returned class implements it.

Did you see your EJB method in entered?

If you are unsure you might attach the code with the method and releated classes (including the line numbers) and the error message that it's possible to see where it failed