Hi! I'm working on an application with a client and a server. I'm using JBoss 4.2 and Java 1.6. On client side I bind an object to JNDI and try to lookup this object on server side. CLIENT: Object callback = ...; | Properties p = new Properties(); | p.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory"); | p.put(Context.PROVIDER_URL, "jnp://localhost:1099"); | Context context = new InitialContext(p); | context.bind (newBindName, callback); // Bind the callback object to JNDI This is the Callback class: public class Callback | implements BCServiceProxy, Serializable, Remote { | | /** | * Logger | */ | private static final Log log = LogFactory.getLog (Callback.class); | | /** | * The listener to be notified about new postboxentries | */ | private transient PostboxListener postboxListener; | | /** | * Constructor | * @param postboxListener listener to be notified about new postboxentries | */ | public Callback (PostboxListener postboxListener) { | this.postboxListener = postboxListener; | } | | /** | * @inheritDoc | */ | public String gotPostboxEntry (PostboxEntry postboxEntry) { | String rc = null; | if (postboxListener!=null) { | rc = postboxListener.gotPostboxEntry (postboxEntry); | } | return rc; | } | | } After the binding I can see the object at the JNDIView in Global JNDI Namespace: +- a5xk891BCServiceProxyPostboxTask 41232010727767 (class: de.postbox.proxies.bcservice.Callback) SERVER: The remote interface BCServiceProxy which the Callback class implements is in a JAR which is deyploed on the server. public interface BCServiceProxy | extends Serializable, Remote { | | /** | * Called when the next postboxentry is known | * @param postboxEntry the next postboxentry | * @return String the id of the workitem, which should be delivered next. | * For null the order of the delivered postboxentries will not be modified | * @throws RemoteException | */ | public String gotPostboxEntry (PostboxEntry postboxEntry) throws RemoteException; | | } Now I try to make the lookup on server side: Properties p = new Properties(); | p.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory"); | p.put(Context.PROVIDER_URL, "jnp://localhost:1099"); | Context context = new InitialContext(p); | Object objref = context.lookup(requestorbindname); This results in an exception: javax.naming.CommunicationException [Root exception is java.lang.ClassNotFoundException: No ClassLoaders found for: de.postbox.proxies.bcservice.Callback (no security manager: RMI class loader disabled)] Why do I get this exception? Is it because I see the concrete class in JNDIView (see above). Shouldn't I see there something like this: +- a5xk891BCServiceProxyPostboxTask 41232010727767 (proxy: $Proxy99 implements interface de.postbox.services.bcservice.proxy.BCServiceProxy)? Any help will be greatly appreciated! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4202062#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...