Hi,
this thing here gets me upset.
I have a simple stateful session bean which is looked up by a remote client.
During the lookup i got an exception:

First the Bean:

package musicstore.session;

import java.util.ArrayList;
import java.util.Collection;

import javax.annotation.Resource;
import javax.ejb.PostConstruct;
import javax.ejb.Remote;
import javax.ejb.SessionContext;
import javax.ejb.Stateful;

import musicstore.entity.MusicCD;



@Remote(Order.class)
public @Stateful class OrderBean implements Order{

 /**
 *
 */
 private static final long serialVersionUID = 1L;

 @Resource SessionContext sessionContext;

 public Collection <MusicCD> orderList;

 private String customerName = "uups, i forgot to set a name";



// @Resource
// protected InitialContext iniCtx;

 @PostConstruct
 public void initialize() {
 this.orderList = new ArrayList<MusicCD>();
 }

 /**
 * Adds a cd to the orderlist
 * @param cd
 */
 public void addCd(MusicCD cd) {
 this.orderList.add(cd);
 }

 /**
 * Removes a cd from the orderlist
 * @param cd
 */
 public void removeCD(MusicCD cd) {
 this.orderList.remove(cd);
 }

 /**
 * Returns a complete arary of all cds in the orderlist
 *
 * @return
 */
 public Collection<MusicCD> getAll() {
 return this.orderList;
 }

 /**
 * Sets the name of the customer for the order
 * @param name
 */
 public void setCustomerName(String name) {
 this.customerName = name;
 }

 /**
 * "Submits" the order and returns a string containing the order
 * @return
 */
 public String submit() {
 // submit the data to a message queue
 // TODO
 String orderstr = new String();
 orderstr = "New Order: \n Customer: "+this.customerName+"\n";
 // Append all cd in the queue
 int count = 1;
 for (MusicCD cd : this.orderList) {
 orderstr = orderstr + count +". " + cd + "\n";
 count++;
 }

 return orderstr;

 }

}

The remote interface

package musicstore.session;

import java.util.Collection;
import musicstore.entity.MusicCD;

public interface Order {

 /**
 * Adds a cd to the orderlist
 * @param cd
 */
 public void addCd(MusicCD cd);

 /**
 * Removes a cd from the orderlist
 * @param cd
 */
 public void removeCD(MusicCD cd);

 /**
 * Returns a complete arary of all cds in the orderlist
 *
 * @return
 */
 public Collection<MusicCD> getAll();

 /**
 * Sets the name of the customer for the order
 * @param name
 */
 public void setCustomerName(String name);

 /**
 * Submits the order and returns a string containing the order
 */
 public String submit();

}

I think this must be without any mistakes. Correct me if its not :-/

And now the client:

package musicstore.clients;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import javax.annotation.EJB;
import javax.naming.InitialContext;

import musicstore.entity.MusicCD;
import musicstore.session.Inventory;
import musicstore.session.Order;
import musicstore.session.OrderBean;


public class MusicStoreClient {

 private Order order;
 public void doinit() {
 try {
 System.out.println("Name: " + Order.class.getName());
 order = (Order) ctx.lookup(Order.class.getName());
 System.out.println(order.submit());
 } catch (Exception e) {
 e.printStackTrace();
 }
 }

 public static void main (String[] args) {
 MusicStoreClient msc = new MusicStoreClient();
 msc.doinit();
 }


}

Everytime i call teh client i got an exception like this one:

Exception in thread "main" java.lang.NoClassDefFoundError: Lorg/jboss/invocation/Invoker;
 at java.lang.Class.getDeclaredFields0(Native Method)
 at java.lang.Class.privateGetDeclaredFields(Class.java:2232)
 at java.lang.Class.getDeclaredField(Class.java:1852)
 at java.io.ObjectStreamClass.getDeclaredSUID(ObjectStreamClass.java:1555)
 at java.io.ObjectStreamClass.access$600(ObjectStreamClass.java:47)
 at java.io.ObjectStreamClass$2.run(ObjectStreamClass.java:381)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.io.ObjectStreamClass.<init>(ObjectStreamClass.java:373)
 at java.io.ObjectStreamClass.lookup(ObjectStreamClass.java:268)
 at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:504)
 at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1546)
 at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1460)
 at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1693)
 at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
 at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1912)
 at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1836)
 at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1713)
 at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
 at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1912)
 at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1836)
 at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1713)
 at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
 at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339)
 at org.jboss.aop.joinpoint.InvocationResponse.readExternal(InvocationResponse.java:107)
 at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1753)
 at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1711)
 at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
 at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1912)
 at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1836)
 at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1713)
 at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
 at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339)
 at org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.read(SerializableUnMarshaller.java:73)
 at org.jboss.remoting.transport.socket.SocketClientInvoker.transport(SocketClientInvoker.java:242)
 at org.jboss.remoting.RemoteClientInvoker.invoke(RemoteClientInvoker.java:112)
 at org.jboss.remoting.Client.invoke(Client.java:226)
 at org.jboss.remoting.Client.invoke(Client.java:189)
 at org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemoteInterceptor.java:41)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:88)
 at org.jboss.aspects.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:34)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:88)
 at org.jboss.aspects.remoting.PojiProxy.invoke(PojiProxy.java:46)
 at $Proxy0.createProxy(Unknown Source)
 at org.jboss.ejb3.JndiProxyFactory.getObjectInstance(JndiProxyFactory.java:32)
 at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:304)
 at org.jnp.interfaces.NamingContext.getObjectInstance(NamingContext.java:1110)
 at org.jnp.interfaces.NamingContext.getObjectInstanceWrapFailure(NamingContext.java:1127)
 at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:690)
 at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:572)
 at javax.naming.InitialContext.lookup(InitialContext.java:351)
 at musicstore.clients.MusicStoreClient.doinit(MusicStoreClient.java:32)
 at musicstore.clients.MusicStoreClient.main(MusicStoreClient.java:223)

When i turn the Bean to a stateless SessionBean, no Problem.
Is there a special way to look up stateful SessionBeans which i do not know?
Please help, this is annoying very much.
Thanks

martin