Name: sg39081 Date: 01/21/2000


java version "1.3.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0-I)
Java HotSpot(TM) Client VM (build 1.3-I, mixed mode)

Consider the following RMI-IIOP program (file Test.java):

class Quantity implements java.io.Serializable
{
  public Object readResolve() throws java.io.ObjectStreamException
  { return this; }
}

interface Massive extends java.rmi.Remote
{
  Quantity getMass() throws java.rmi.RemoteException;
}

public class Test extends javax.rmi.PortableRemoteObject implements Massive
{
  public Test() throws java.rmi.RemoteException {}
  public Quantity getMass() throws java.rmi.RemoteException
  { return new Quantity(); }

  public static void main( String[] args )
  {
    System.setProperty( "java.naming.factory.initial",
                        "com.sun.jndi.cosnaming.CNCtxFactory" );
    try
    {
      javax.naming.Context naming = new javax.naming.InitialContext();
      naming.rebind( "Server", new Test() );
      ((Massive) javax.rmi.PortableRemoteObject.narrow(
        naming.lookup( "Server" ), Massive.class )).getMass();
    }
    catch ( Exception e )
    {
      e.printStackTrace();
    }
  }
}

Compile this using command: javac Test.java
Compile the RMI-IIOP stubs and ties using: rmic -iiop Test
Run the name server in the background using command: start tnameserv

Run the program using command: java Test
The following output is produced:

java.lang.RuntimeException
        at com.sun.corba.se.internal.io.ObjectStreamClass.readResolve(Unknown Source)
        at com.sun.corba.se.internal.io.IIOPInputStream.simpleReadObject(Unknown Source)
        at com.sun.corba.se.internal.io.ValueHandlerImpl.readValueInternal(Unknown Source)
        at com.sun.corba.se.internal.io.ValueHandlerImpl.readValue(Unknown Source)
        at com.sun.corba.se.internal.iiop.CDRInputStream.read_value(Unknown Source)
        at com.sun.corba.se.internal.javax.rmi.CORBA.Util.copyObject(Unknown Source)
        at javax.rmi.CORBA.Util.copyObject(Unknown Source)
        at _Massive_Stub.getMass(Unknown Source)
        at Test.main(Test.java:26)
java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
        java.rmi.MarshalException: CORBA MARSHAL 0 No; nested exception is:
        org.omg.CORBA.MARSHAL: Unable to read value from underlying bridge : null minor code: 0 completed: No
java.rmi.MarshalException: CORBA MARSHAL 0 No; nested exception is:
        org.omg.CORBA.MARSHAL: Unable to read value from underlying bridge : null minor code: 0 completed: No
org.omg.CORBA.MARSHAL: Unable to read value from underlying bridge : null minor
 code: 0 completed: No
        <<no stack trace available>>

This does not happen if the apparently ineffective Quantity.readResolve() method
is removed.
(Review ID: 100138)
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