The Problem looks very simple. I like to access a RMI Server via an EJB. The reason for this is that I need to load a native library within a Java API. I know that this is not allowed within an EJB. So I would like to create a RMI Server which handles this task.

Since I'm an EJB newbee I first created a small helloWorld example. But when I want to access the HelloImpl RMI Server I get the following exeption (I'm using JBOSS 3.2.3):

			

			ERROR [STDERR] javax.naming.CommunicationException [Root exception is java.rmi.UnmarshalException: error unmarshalling return; nested exception is:
			

			java.lang.ClassNotFoundException: No ClassLoaders found for: hello.server.HelloImpl_Stub (no security manager: RMI class loader disabled)]
			

			

			19:48:50,937 ERROR [STDERR] at com.sun.jndi.rmi.registry.RegistryContext.lookup(RegistryContext.java:92)
			

			

			19:48:50,937 ERROR [STDERR] at com.sun.jndi.rmi.registry.RegistryContext.lookup(RegistryContext.java:98)
			

			19:48:50,937 ...
		

			

			

			
				

				try {
				

				

				InitialContext serverContext = new InitialContext();
				

				

				Object obj = serverContext.lookup("java:comp/env/NamingFactory"); //NamingFactory is an env variable
				

				

				if (obj != null) {
				

				

				this.namingFactory = obj.toString();
				

				

				}
				

				

				obj = serverContext.lookup("java:comp/env/NamingURL");
				

				

				if (obj != null) {
				

				

				this.namingUrl = obj.toString(); //NamingUrl is an env variable
				

				

				}
				

				

				

				Hashtable lTable = new Hashtable();
				

				

				lTable.put(Context.INITIAL_CONTEXT_FACTORY, this.namingFactory);
				

				

				lTable.put(Context.PROVIDER_URL, this.namingUrl);
				

				

				Context remoteContext = new InitialContext(lTable);
				

				

				obj = remoteContext.lookup("hello-server");//the Problem occures here
				

				

				HelloServer helloServer = (HelloServer) PortableRemoteObject.narrow(obj, HelloServer.class);
				

				

				String result = helloServer.sayHello();
				

				

				System.out.println(result);
				

				

				}
				

				

				catch(Exception ex) {
				

				

				ex.printStackTrace();
				

				

				}
				

			
		

Here is the code of the RMI Server:

			

			package hello.server;
			

			

			import java.rmi.server.*;
			

			

			import java.rmi.*;
			

			

			import hello.HelloServer;
			

			

			public class HelloImpl extends UnicastRemoteObject implements HelloServer {
			

			

			public HelloImpl() throws RemoteException {
			

			}
			

			

			public String sayHello() {
			

			

			return "Hello World";
			

			

			}
			

			

			public static void main(String args[]) {
			

			

			try {
			

			

			Naming.rebind("//localhost:2001/hello-server", new HelloImpl());
			

			}
			

			catch(Exception ex) {
			

			

			ex.printStackTrace();
			

			}
			

			

			}