Name: gm110360			Date: 02/06/2002


FULL PRODUCT VERSION :
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta3-b84)
Java HotSpot(TM) Client VM (build 1.4.0-beta3-b84, mixed mode)

FULL OPERATING SYSTEM VERSION :
Microsoft Windows 2000 [Version 5.00.2195]



A DESCRIPTION OF THE PROBLEM :
Exceptions and subclasses (and possibly Throwable
subclasses - haven't tested) serialized in 1.4 (Tomcat 3.2
server) can not be deserialized using jdk 1.1 (Internet
Explorer client).


REGRESSION.  Last worked in version 1.3.1

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Write a servlet that serializes an Exception (or
subclass) to the response outputstream.
2. Write an applet that reads the object.
3. Run the servlet and serve the applet on Tomcat 3.2 (will
probably work on any server running in 1.4 though)
4. Connect to the servlet using the applet in a 1.1 client
(i.e. Internet Explorer)

EXPECTED VERSUS ACTUAL BEHAVIOR :
Surely Exceptions should be serializable between different
VMs, as they were before 1.4?

ERROR MESSAGES/STACK TRACES THAT OCCUR :
java.lang.ClassNotFoundException
	at java/io/ObjectInputStream.loadClass0 (ObjectInputStream.java)
	at java/io/ObjectInputStream.resolveClass (ObjectInputStream.java:852)
	at java/io/ObjectInputStream.readClassDescriptor
(ObjectInputStream.java:1165)
	at java/io/ObjectInputStream.readArray (ObjectInputStream.java:1100)
	at java/io/ObjectInputStream.checkSpecialCases
(ObjectInputStream.java:1063)
	at java/io/ObjectInputStream.readObject (ObjectInputStream.java:300)
	at java/io/ObjectStreamClass.doMismatchedRead (ObjectStreamClass.java)
	at java/io/ObjectInputStream.defaultReadObject
(ObjectInputStream.java:448)
	at java/io/ObjectInputStream.readNewObject (ObjectInputStream.java:1296)
	at java/io/ObjectInputStream.readObject (ObjectInputStream.java:309)

This bug can be reproduced always.

---------- BEGIN SOURCE ----------
A test applet:

import java.io.*;
import java.net.*;
public class TestApplet extends java.applet.Applet {

    public void init () {
        try
        {
            URL url = new URL(getCodeBase()+"servlet/TestServlet");
            URLConnection urlConn = url.openConnection();
            ObjectInputStream ois =
                new ObjectInputStream(urlConn.getInputStream());
            Object obj = ois.readObject();
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }
}

and a test servlet:

import javax.servlet.*;
import javax.servlet.http.*;
public class TestServlet extends HttpServlet {

    protected void processRequest(HttpServletRequest request,
HttpServletResponse response)
    throws ServletException, java.io.IOException {
        java.io.ObjectOutputStream out =
            new java.io.ObjectOutputStream(response.getOutputStream());
        out.writeObject(new Exception("Test Exception"));
        out.close();
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse
response)
    throws ServletException, java.io.IOException {
        processRequest(request, response);
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse
response)
    throws ServletException, java.io.IOException {
        processRequest(request, response);
    }
}

---------- END SOURCE ----------

Release Regression From : merlin-beta3
The above release value was the last known release where this 
bug was known to work. Since then there has been a regression.

Release Regression From : merlin-beta3
The above release value was the last known release where this 
bug was known to work. Since then there has been a regression.

(Review ID: 138558) 
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