P3
Problem Description
====================
JPI 1.3beta-O ( I downloaded it from the public web site on java.sun.com )
There is some problem in this version. I got the following error on JPI console:
Java(TM) Plug-in: Version 1.3beta-O
Using JRE version 1.3beta Java(TM) HotSpot Client VM
User home directory = C:\WINNT\Profiles\Administrator
Proxy Configuration: Manual Configuration
Proxy: 129.158.71.40:8080
Proxy Overrides:
JAR cache disabled.
init()
start()
Action Performed
Created Url
showing document
stop()
ending action performed
Exception occurred during event dispatching:
destroy()
java.lang.NullPointerException: null pData
init()
at sun.awt.windows.WInputMethod.handleNativeIMEEvent(Native Method)
start()
at sun.awt.windows.WInputMethod.dispatchEvent(WInputMethod.java:256)
at sun.awt.im.InputContext.dispatchEvent(InputContext.java:173)
at sun.awt.im.InputMethodContext.dispatchEvent(InputMethodContext.java:180)
at java.awt.Component.dispatchEventImpl(Component.java:2473)
at java.awt.Container.dispatchEventImpl(Container.java:1302)
at java.awt.Component.dispatchEvent(Component.java:2443)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:2504)
at java.awt.LightweightDispatcher.trackMouseEnterExit(Container.java:2366)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:2261)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:2191)
at java.awt.Container.dispatchEventImpl(Container.java:1289)
at java.awt.Component.dispatchEvent(Component.java:2443)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:302)
at java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:95)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:86)
Test Env
========
1. Win NT 4.0 SP5
2. IE 5
3. JPI Plugin 1.3beta-O
Test Case
==========
=================== Test1.html ==================
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="GENERATOR" content="Mozilla/4.6 [en] (WinNT; I) [Netscape]">
<title>TestApplet.html</title>
</head>
<body>
<!--"CONVERTED_APPLET"--><!-- CONVERTER VERSION 1.0 --><object classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
WIDTH = 300 HEIGHT = 300 codebase="http://java.sun.com/products/plugin/1.2/jinstall-12-win32.cab#Version=1,2,0,0"><param NAME = CODE VALUE = "Test1.class" ><param NAME="type" VALUE="application/x-java-applet;version=1.2"><COMMENT><embed type="application/x-java-applet;version=1.2" java_CODE = "Test1.class" CODE="Test1.class" WIDTH = 300 HEIGHT = 300 pluginspage="http://java.sun.com/products/plugin/1.2/plugin-install.html"><noembed></COMMENT></noembed></embed></object><!--
<APPLET CODE = "Test1.class" WIDTH = 300 HEIGHT = 300 >
</APPLET>
--><!--"END_CONVERTED_APPLET"-->
</body>
</html>
============ Test1.java ===========
import javax.swing.JApplet;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.net.*;
public class Test1 extends JApplet implements ActionListener{
JButton button = new JButton("Press Me");
public void init() {
System.out.println("init()");
getContentPane().add(button);
button.addActionListener(this);
}
public void start(){
System.out.println("start()");
}
public void stop(){
System.out.println("stop()");
}
public void destroy(){
System.out.println("destroy()");
}
public void actionPerformed(ActionEvent ae){
System.out.println("Action Performed");
try {
URL url = new URL("file://d:/Test1.html");
System.out.println("Created Url");
getAppletContext().showDocument(url);
System.out.println("showing document" );
}
catch (Exception e){
System.out.println("Exception Has happened");
e.printStackTrace();
}
System.out.println("ending action performed");
}
}
Reproducibility
===============
Yes, always.
Possible Cause
===============
From our investigations it seems to be a problem is in the garbage
collection being initiated too early which causes referencing problems
causing the JVM to throw exceptions.
This only occurs when running IE 4 or 5 on NT.
====================
JPI 1.3beta-O ( I downloaded it from the public web site on java.sun.com )
There is some problem in this version. I got the following error on JPI console:
Java(TM) Plug-in: Version 1.3beta-O
Using JRE version 1.3beta Java(TM) HotSpot Client VM
User home directory = C:\WINNT\Profiles\Administrator
Proxy Configuration: Manual Configuration
Proxy: 129.158.71.40:8080
Proxy Overrides:
JAR cache disabled.
init()
start()
Action Performed
Created Url
showing document
stop()
ending action performed
Exception occurred during event dispatching:
destroy()
java.lang.NullPointerException: null pData
init()
at sun.awt.windows.WInputMethod.handleNativeIMEEvent(Native Method)
start()
at sun.awt.windows.WInputMethod.dispatchEvent(WInputMethod.java:256)
at sun.awt.im.InputContext.dispatchEvent(InputContext.java:173)
at sun.awt.im.InputMethodContext.dispatchEvent(InputMethodContext.java:180)
at java.awt.Component.dispatchEventImpl(Component.java:2473)
at java.awt.Container.dispatchEventImpl(Container.java:1302)
at java.awt.Component.dispatchEvent(Component.java:2443)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:2504)
at java.awt.LightweightDispatcher.trackMouseEnterExit(Container.java:2366)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:2261)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:2191)
at java.awt.Container.dispatchEventImpl(Container.java:1289)
at java.awt.Component.dispatchEvent(Component.java:2443)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:302)
at java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:95)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:86)
Test Env
========
1. Win NT 4.0 SP5
2. IE 5
3. JPI Plugin 1.3beta-O
Test Case
==========
=================== Test1.html ==================
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="GENERATOR" content="Mozilla/4.6 [en] (WinNT; I) [Netscape]">
<title>TestApplet.html</title>
</head>
<body>
<!--"CONVERTED_APPLET"--><!-- CONVERTER VERSION 1.0 --><object classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
WIDTH = 300 HEIGHT = 300 codebase="http://java.sun.com/products/plugin/1.2/jinstall-12-win32.cab#Version=1,2,0,0"><param NAME = CODE VALUE = "Test1.class" ><param NAME="type" VALUE="application/x-java-applet;version=1.2"><COMMENT><embed type="application/x-java-applet;version=1.2" java_CODE = "Test1.class" CODE="Test1.class" WIDTH = 300 HEIGHT = 300 pluginspage="http://java.sun.com/products/plugin/1.2/plugin-install.html"><noembed></COMMENT></noembed></embed></object><!--
<APPLET CODE = "Test1.class" WIDTH = 300 HEIGHT = 300 >
</APPLET>
--><!--"END_CONVERTED_APPLET"-->
</body>
</html>
============ Test1.java ===========
import javax.swing.JApplet;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.net.*;
public class Test1 extends JApplet implements ActionListener{
JButton button = new JButton("Press Me");
public void init() {
System.out.println("init()");
getContentPane().add(button);
button.addActionListener(this);
}
public void start(){
System.out.println("start()");
}
public void stop(){
System.out.println("stop()");
}
public void destroy(){
System.out.println("destroy()");
}
public void actionPerformed(ActionEvent ae){
System.out.println("Action Performed");
try {
URL url = new URL("file://d:/Test1.html");
System.out.println("Created Url");
getAppletContext().showDocument(url);
System.out.println("showing document" );
}
catch (Exception e){
System.out.println("Exception Has happened");
e.printStackTrace();
}
System.out.println("ending action performed");
}
}
Reproducibility
===============
Yes, always.
Possible Cause
===============
From our investigations it seems to be a problem is in the garbage
collection being initiated too early which causes referencing problems
causing the JVM to throw exceptions.
This only occurs when running IE 4 or 5 on NT.