FULL PRODUCT VERSION :
java version "1.6.0_14"
Java(TM) SE Runtime Environment (build 1.6.0_14-b08)
Java HotSpot(TM) Server VM (build 14.0-b16, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Running server on Windows_NT
uname -a
Windows_NT **** 5 01 586

Running client on Linux:
bash-3.2$ uname -a
Linux **** 2.6.18-128.el5xen #1 SMP Wed Jan 21 09:07:41 EST 2009 x86_64 x86_64 x86_64 GNU/Linux

A DESCRIPTION OF THE PROBLEM :
I have a server program registered on the orb, and a client looking up the remote object. When I pass a java.lang.reflect.Proxy object from the server to the client, I get the following exception (see below):

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
I have a simple reproducer (code below). Please let me know if you want any more info.


ERROR MESSAGES/STACK TRACES THAT OCCUR :
WARNING: "IOP00810257: (MARSHAL) Could not find class"
org.omg.CORBA.MARSHAL: vmcid: SUN minor code: 257 completed: Maybe
        at com.sun.corba.se.impl.logging.ORBUtilSystemException.couldNotFindClass(ORBUtilSystemException.java:8260)
        at com.sun.corba.se.impl.encoding.CDRInputStream_1_0.read_value(CDRInputStream_1_0.java:1013)
        at com.sun.corba.se.impl.encoding.CDRInputStream.read_value(CDRInputStream.java:253)
        at _RServer_Stub.getPC(_RServer_Stub.java:38)
        at ProxyIIOPBreakage.main(ProxyIIOPBreakage.java:24)
Caused by: java.lang.ClassNotFoundException
        ... 4 more
Exception in thread "main" java.rmi.MarshalException: CORBA MARSHAL 1398079745 Maybe; nested exception is:
        org.omg.CORBA.MARSHAL: vmcid: SUN minor code: 257 completed: Maybe
        at com.sun.corba.se.impl.javax.rmi.CORBA.Util.mapSystemException(Util.java:197)
        at javax.rmi.CORBA.Util.mapSystemException(Util.java:67)
        at _RServer_Stub.getPC(_RServer_Stub.java:49)
        at ProxyIIOPBreakage.main(ProxyIIOPBreakage.java:24)
Caused by: org.omg.CORBA.MARSHAL: vmcid: SUN minor code: 257 completed: Maybe
        at com.sun.corba.se.impl.logging.ORBUtilSystemException.couldNotFindClass(ORBUtilSystemException.java:8260)
        at com.sun.corba.se.impl.encoding.CDRInputStream_1_0.read_value(CDRInputStream_1_0.java:1013)
        at com.sun.corba.se.impl.encoding.CDRInputStream.read_value(CDRInputStream.java:253)
        at _RServer_Stub.getPC(_RServer_Stub.java:38)
        ... 1 more
Caused by: java.lang.ClassNotFoundException


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
Server code:

class Server
  implements RServer
{
  public Server(Hashtable properties)
    throws Throwable
  {
    PortableRemoteObject.exportObject(this);

    Context context = new InitialContext(properties);
    context.rebind("server", this);
  }

  public Proxy getPC() {
    Sum sum = new Sum(new Integer(1), new Integer(2));

    Handler handler = new Handler(sum);

    Class[] interfacesArray = new Class[] {ISum.class};

    return ((Proxy) Proxy.newProxyInstance(Sum.class.getClassLoader(), interfacesArray, handler));

  }
}

Client code:

public class ProxyIIOPBreakageClient
{
  public static void main(String[] args)
    throws Throwable
  {
    Hashtable properties = new Hashtable();
    properties.put("java.naming.factory.initial",
                   "com.sun.jndi.cosnaming.CNCtxFactory");
    properties.put("java.naming.provider.url", "iiop://10.148.122.143:3700");


    Context context = new InitialContext(properties);
    Object ref = context.lookup("server");
    RServer server = (RServer) PortableRemoteObject.narrow(ref, RServer.class);

    Object gotpc = (Object) server.getPC();
    System.err.println(gotpc);
  }
}

Common interface:
interface RServer
  extends Remote
{

  Proxy getPC()
    throws RemoteException;

}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
We wrap the Proxy object in a wrapper class called ProxyDesc. This has a readResolve method, which reconstructs the Proxy on the other side.

This is the same issue discussed here (in 2004):

http://www.omg.org/issues/issue7595.txt

I am wondering if there is a plan to allow marshalling Proxy object over RMI-IIOP