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6.4

Upon browser close CPU spikes 100% and stays till all IE browser windows are closed

Asked by veepee09 in JavaScript, J2EE, Plug Ins

Tags: Javascript, Java, IE 6.0

My application uses a JSP/Javascript to launch applet within browser (IE 6) window. Upon closing the browser running the applet, the window closes fine, but immediately the CPU spikes to 100%. It stays that way till all IE windows are closed and then CPU usage becomes normal. This happened after JRE upgrade from 1.4.2_13 to 1.6.0_05. I tested with 1.5.0_11, 1.6.0_x and have the same problem. It works perfectly fine (window close with no CPU spike) with 1.4.2_13.

I have attached the JSP/Javascript code. Applet class is a huge java class(lots of functionality) which basically extends JApplet. If you want I can attach it too. Let me know.

I have tried lots of options like: Using plain Applet instead of JApplet, Changing innerHTML of applet tag, but non seems to work.

I would appreciate any help from experts. There is a company wide need to upgrade to 1.6.x JRE. Please help.

Thanks 
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JSP code:
------------------------------
 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
<html:html>
<HEAD>
<%@ page 
language="java"
import="com.abcdef.RaiderConstants, com.abcdef.ConfigManager"
contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"
%>
<META http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<meta http-equiv="Page-Enter" content="progid:DXImageTransform.Microsoft.Fade(duration=0)" />
<META name="GENERATOR" content="IBM WebSphere Studio">
<TITLE>Raider Detail</TITLE>
 
<SCRIPT LANGUAGE="JavaScript">
 
function maximizeWindow(){	
	if (window.screen)
	{
		var w=screen.availWidth;
		var h=screen.availHeight;
		window.resizeTo(w,h);		
	}
}
 
function handleExitEvent()
{
	var isDataChanged = false;
 
	//call DetailScreenApplet method to check if unsaved changes exists
	isDataChanged = DetailScreenApplet.checkDataChange();
 
	if (isDataChanged == false)
	{
		window.close();
	}
	else
	{
		isDataChanged = false;
		return "You have uncommitted changes";
	}
 
}
 
function closeDetailWindow() {
	try {
		window.close();
	}
	catch (e)
	{
	}
}
 
window.onbeforeunload = handleExitEvent;
 
function setInitialFocus(){	
	DetailScreenApplet.setInitialFocus();	
}
 
</SCRIPT>
 
</HEAD>
 
<BODY leftmargin="0" rightmargin="0" topmargin="0" marginwidth="0" marginheight="0" bgcolor="#787878" onload="setInitialFocus();maximizeWindow();" >
 
<%
String env = System.getProperty("APP_ENV");
ConfigManager configMgr = ConfigManager.getInstance();
String appType = configMgr.getProperty(RaiderConstants.RAIDER_EAR_ENTITY_NAMESPACE, RaiderConstants.RAIDER_EAR_ENTITY_TYPE);
%> 
<form method=post action="detail.do?method=cleanupCache" name="DetailForm">
	<html:hidden name='flightLegDetailFormBean' property='detailWinId'/>
	<input type="hidden" name="applicationType" value="<%=appType%>">
	<input type="hidden" name="deploymentEnv" value="<%=env%>">
</form> 
 
<script>
var  screenHeight = 0;
var screenWidth = 0;
var jsAppType = document.DetailForm.applicationType.value;
var jsDeploymentEnv = document.DetailForm.deploymentEnv.value;
 
 
screenHeight = screen.height;
screenWidth = screen.width;
 
if(screenHeight == 1024 && screenWidth == 1280){
	screenHeight = 960;
	screenWidth = 1250;
}else if(screenHeight == 768 && screenWidth == 1024){
	screenHeight = 708;
	screenWidth = 995;
} else {
	alert("Screen resolution not supported, Please set screen resolution to 1280X1024 or 1024X768");
	screenHeight = 960;
	screenWidth = 1250;
}
 
document.write("<OBJECT classid = 'clsid:8AD9C840-044E-11D1-B3E9-00805F499D93'id='dtlApplet' ");
document.write("codebase = 'http://java.sun.com/update/1.6.0/jinstall-6-windows-i586.cab'");
document.write("WIDTH = " + screenWidth + " HEIGHT = " + screenHeight + " NAME = 'DetailScreenApplet' tabindex='1' >");
document.write("<PARAM NAME = 'CODE' VALUE = 'com.abcdef.DetailScreenApplet.class' >");
document.write("<PARAM NAME = 'CODEBASE' VALUE = '<bean:write name='flightLegDetailFormBean' property='codeBase'/>' >");
document.write("<PARAM NAME = 'ARCHIVE' VALUE = 'graph.jar, raiderSignedApplet.jar' >");
document.write("<PARAM NAME = 'NAME' VALUE = 'DetailScreenApplet' >");
document.write("<PARAM NAME = 'type' VALUE = 'application/x-java-applet;version=1.6'>");
document.write("<PARAM NAME = 'scriptable' VALUE = 'true'>");
document.write("<PARAM NAME = 'link' VALUE='<bean:write name='flightLegDetailFormBean' property='link'/>' >");
document.write("<PARAM NAME = 'userId' VALUE = '<bean:write name='flightLegDetailFormBean' property='userId'/>' >");
document.write("<PARAM NAME = 'detailWindowId' VALUE = '<bean:write name='flightLegDetailFormBean' property='detailWinId'/>' >");
document.write("<PARAM name = 'boxbgcolor' value='#787878'>");
document.write("<PARAM name = 'screenHeight' value=' " + screenHeight + " ' >");
document.write("<PARAM name = 'screenWidth' value=' " + screenWidth + " ' >");
document.write("<PARAM name = 'applicationType' value=' " + jsAppType + " ' >");
document.write("<PARAM name = 'deploymentEnv' value=' " + jsDeploymentEnv + " ' >");
document.write("<COMMENT>");
document.write("</COMMENT>");
document.write("</OBJECT>");
 
document.getElementById("dtlApplet").focus();
</script>
 
</BODY>
</html:html>
------------------------------
[+][-]03/14/08 09:26 AM, ID: 21126921Expert Comment

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About this solution

Zones: JavaScript, J2EE, Plug Ins
Tags: Javascript, Java, IE 6.0
Sign Up Now!
Solution Provided By: veepee09
Participating Experts: 1
Solution Grade: A
 
 
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