EJB getHandle()

Question

Hi guys !!!!
i've a little problem using the function getHandle() to get the handle of an Stateful EJB . My AppServer is Orion 2.0.1
Give a look to this piece of code :
package test;
import java.util.*;
import java.io.*;
import java.rmi.RemoteException;
import javax.naming.*;
import javax.rmi.*;
import javax.ejb.*;
import com.evermind.server.ejb.*;
import myejb.*;
public class ClientHandle
public static void main(String[] args)
   try
     Context context = new InitialContext();
     Mysessionhome homeObj =    (Mysessionhome)context.lookup("ejb/MioSession");
     MySessionRemote Bean = (MySessionRemote)homeObj.create(-666);
     Handle oMyHandle = Bean.getHandle();
     ArrayList oData = new ArrayList();
     oData.add(new String("ciao"));
     Bean.putData(oData);
     oData=null;
     Bean.remove();
   catch (Exception ex) { ex.printStackTrace(); }
}On this line of code : Handle oMyHandle = Bean.getHandle()
is generated the following exception
java.rmi.UnmarshalException: Error deserializing return-value: java.io.InvalidClassException: com.evermind.server.ejb.StatefulSessionHandle; local class incompatible: stream classdesc serialVersionUID = -1212978352730626745, local class serialVersionUID = 631107630195966815
     at com.evermind._al.EXCEPTION_ORIGINATES_FROM_THE_REMOTE_SERVER(.:1497)
     at com.evermind._al.invokeMethod(.:1420)
     at com.evermind._fr.invoke(.:53)
     at com.evermind._fq.invoke(.:22)
     at com.evermind._jj.invoke(.:31)
     at __Proxy1.getHandle(Unknown Source)
     at test.ClientHandle.main(ClientHandle.java:23)What does it mean? How can i solve the problem?
thanx

Answer 1

That's not what the error message says. It is telling
you explicitely that the (serialized) version returned
from the stream (from the server) is different that
the local one (client). Check again.mhmm...i've checked again. All calsses files are identical. The deployed class files match with the client class files!!!
Edit your code and include the following field in the
offending class:
static final long serialVersionUID =
-1212978352730626745L; Recompile everything and try again...i've included that piece of code inside the definition of the Remote Interface and in the implementation of the EJB without solving the problem. How is it possbile that the bean works fine using his remote interface from the client while using handle the serialID is different?
I'm thinking that my client run using the JBuilder 8 IDE while the deployed version of the EJB is compiled using ANT !!!!
Could be a difference between the two compiled class ?