This regression was introduced in the JDK1.2fcs-H build. It causes
"appletviewer http://schedroom.central/schedroom.html" to fail with
a serialization failure that reports that an array of java.lang.String has incompatibly been switched from Serializable to Externalizable.
The descriptor in the stream states the array is Serializable and
the JVM 1.2fcsH runtime is incorrectly calculating that the
array of java.lang.String is Externalizable.

A small test program demonstrates that the following is failing
in the H build.

The call to
Externalizable.class.isAssignableFrom(Class.forName("[Ljava.lang.String;")
is incorrectly returning TRUE in the H build. It should always be false and was
false in the G build.

Test program run against G and H build to demonstrate the regression.
(JIT was shut off to rule that out.)

joef/scarry>/js/files/JDK1.2FCS-H/solaris/bin/java Array
Warning: JIT compiler "none" not found. Will use interpreter.
name=[Ljava.lang.String;
Class [Ljava.lang.String; isAssignableTo(Serializable) = true
Class [Ljava.lang.String; isAssignableTo(Externalizable) = true /* REGRESSION*/

joef/scarry>/js/files/JDK1.2FCS-G/solaris/bin/java Array
Warning: JIT compiler "none" not found. Will use interpreter.
name=[Ljava.lang.String;
Class [Ljava.lang.String; isAssignableTo(Serializable) = true
Class [Ljava.lang.String; isAssignableTo(Externalizable) = false


Test program:

import java.io.*;
public class Array {

    public static void main(String args[]) {
String[] array = new String[2];
Class cl = array.getClass();
System.out.println("name=" + cl.getName());
System.out.println("Class " + cl.getName() + " isAssignableTo(Serializable) = " + Serializable.class.isAssignableFrom(cl));

System.out.println("Class " + cl.getName() + " isAssignableTo(Externalizable) = " + Externalizable.class.isAssignableFrom(cl));
    }
};


Schedroom failure:

joef/scarry>/js/files/JDK1.2FCS-H/solaris/bin/appletviewer http://schedroom.central/schedroom.html
Warning: JIT compiler "none" not found. Will use interpreter.
java.rmi.UnmarshalException: Error unmarshaling return; nested exception is:
        java.io.InvalidClassException: [Ljava.lang.String;; Serializable is incompatible with Externalizable
java.io.InvalidClassException: [Ljava.lang.String;; Serializable is incompatible with Externalizable
        at java.io.ObjectStreamClass.validateLocalClass(ObjectStreamClass.java:458)
        at java.io.ObjectStreamClass.setClass(ObjectStreamClass.java:482)
        at java.io.ObjectInputStream.inputClassDescriptor(ObjectInputStream.java:776)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:348)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:227)
        at java.io.ObjectInputStream.inputArray(ObjectInputStream.java:793)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:352)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:227)
        at sunir.schedroom.server.SrServer_Stub.getAllTimeZone(SrServer_Stub.java:271)
        at sunir.schedroom.client.Main.<init>(Main.java:112)
        at sunir.schedroom.client.SrLogin.actionPerformed(SrLogin.java:145)
        at java.awt.TextField.processActionEvent(TextField.java:470)
        at java.awt.TextField.processEvent(TextField.java:443)
        at java.awt.Component.dispatchEventImpl(Component.java:2364)
        at java.awt.Component.dispatchEvent(Component.java:2275)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:258)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:68)