Servlet throws IOException when browser is "stopped"

Hello,
I have a servlet running on the Sun ONE Web server 6.1 that throws this error message: "java.io.IOException: WEB8004: Error flushing the output stream".
Through my testing, it seems as if this is caused by the user pressing the stop button before the output can be completely commited to the client. Strangely enough the error seems to thrown when IE is the browser but not when Firefox is. My guess is that what is happening is the client connection is closed when stop is pressed in IE and the server cannot write to the client anymore so the error is thrown.
I was wondering if anyone has any insight into how to prevent this from getting thrown. I realize that this error is not a major thing and probably doesn't need to be worried about, but it is quite annoying because webmaster gets emailed anytime an exception is thrown so cutting down on pointless exceptions is something we like to do :)
Thanks in advance.

You could also try hitting the browser's refresh button many times as quickly as possible; it should also give similar errors. Or keep Control-R (reload) pressed down and let the keyboard's auto-repeat do its work.
When the browser is in the process of fetching a page and decides it isn't interested in the page after all, it closes the TCP/IP connection to the server. The server will get an IOException. Nothing you can do about that. Write a catch block that ignores IOException when flushing a web page. Or maybe log "error sending page, the user probably hit the reload button", without the stack trace, into an audit log.

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this is my second time posting this, take note of it. I can't remember where i got it from, but credits go to the person that wrote it. It has helped me out thousands of times!!!
to use, compile, then call from your program:
org.newio.utils.BrowserLauncher.openURL("your url here")dfwtc
package org.newio.utils;
import java.io.File;
import java.io.IOException;
import java.lang.reflect.*;
public class BrowserLauncher
    private static int jvm;
    private static Object browser;
    private static boolean loadedWithoutErrors;
    private static Class mrjFileUtilsClass;
    private static Class mrjOSTypeClass;
    private static Class macOSErrorClass;
    private static Class aeDescClass;
    private static Constructor aeTargetConstructor;
    private static Constructor appleEventConstructor;
    private static Constructor aeDescConstructor;
    private static Method findFolder;
    private static Method getFileType;
    private static Method makeOSType;
    private static Method putParameter;
    private static Method sendNoReply;
    private static Object kSystemFolderType;
    private static Integer keyDirectObject;
    private static Integer kAutoGenerateReturnID;
    private static Integer kAnyTransactionID;
    private static final int MRJ_2_0 = 0;
    private static final int MRJ_2_1 = 1;
    private static final int WINDOWS_NT = 2;
    private static final int WINDOWS_9x = 3;
    private static final int OTHER = -1;
    private static final String FINDER_TYPE = "FNDR";
    private static final String FINDER_CREATOR = "MACS";
    private static final String GURL_EVENT = "GURL";
    private static final String FIRST_WINDOWS_PARAMETER = "/c";
    private static final String SECOND_WINDOWS_PARAMETER = "start";
    private static final String NETSCAPE_OPEN_PARAMETER_START = " -remote 'openURL(";
    private static final String NETSCAPE_OPEN_PARAMETER_END = ")'";
    private static String errorMessage;
    private BrowserLauncher()
    private static boolean loadClasses()
        switch(jvm)
        default:
            break;
        case 0: // '\0'
            try
                Class aeTargetClass = Class.forName("com.apple.MacOS.AETarget");
                macOSErrorClass = Class.forName("com.apple.MacOS.MacOSError");
                Class osUtilsClass = Class.forName("com.apple.MacOS.OSUtils");
                Class appleEventClass = Class.forName("com.apple.MacOS.AppleEvent");
                Class aeClass = Class.forName("com.apple.MacOS.ae");
                aeDescClass = Class.forName("com.apple.MacOS.AEDesc");
                aeTargetConstructor = aeTargetClass.getDeclaredConstructor(new Class[] {
                    Integer.TYPE
                appleEventConstructor = appleEventClass.getDeclaredConstructor(new Class[] {
                    Integer.TYPE, Integer.TYPE, aeTargetClass, Integer.TYPE, Integer.TYPE
                aeDescConstructor = aeDescClass.getDeclaredConstructor(new Class[] {
                    java.lang.String.class
                makeOSType = osUtilsClass.getDeclaredMethod("makeOSType", new Class[] {
                    java.lang.String.class
                putParameter = appleEventClass.getDeclaredMethod("putParameter", new Class[] {
                    Integer.TYPE, aeDescClass
                sendNoReply = appleEventClass.getDeclaredMethod("sendNoReply", new Class[0]);
                Field keyDirectObjectField = aeClass.getDeclaredField("keyDirectObject");
                keyDirectObject = (Integer)keyDirectObjectField.get(null);
                Field autoGenerateReturnIDField = appleEventClass.getDeclaredField("kAutoGenerateReturnID");
                kAutoGenerateReturnID = (Integer)autoGenerateReturnIDField.get(null);
                Field anyTransactionIDField = appleEventClass.getDeclaredField("kAnyTransactionID");
                kAnyTransactionID = (Integer)anyTransactionIDField.get(null);
                break;
            catch(ClassNotFoundException cnfe)
                errorMessage = cnfe.getMessage();
                return false;
            catch(NoSuchMethodException nsme)
                errorMessage = nsme.getMessage();
                return false;
            catch(NoSuchFieldException nsfe)
                errorMessage = nsfe.getMessage();
                return false;
            catch(IllegalAccessException iae)
                errorMessage = iae.getMessage();
            return false;
        case 1: // '\001'
            try
                mrjFileUtilsClass = Class.forName("com.apple.mrj.MRJFileUtils");
                mrjOSTypeClass = Class.forName("com.apple.mrj.MRJOSType");
                Field systemFolderField = mrjFileUtilsClass.getDeclaredField("kSystemFolderType");
                kSystemFolderType = systemFolderField.get(null);
                findFolder = mrjFileUtilsClass.getDeclaredMethod("findFolder", new Class[] {
                    mrjOSTypeClass
                getFileType = mrjFileUtilsClass.getDeclaredMethod("getFileType", new Class[] {
                    java.io.File.class
                break;
            catch(ClassNotFoundException cnfe)
                errorMessage = cnfe.getMessage();
                return false;
            catch(NoSuchFieldException nsfe)
                errorMessage = nsfe.getMessage();
                return false;
            catch(NoSuchMethodException nsme)
                errorMessage = nsme.getMessage();
                return false;
            catch(SecurityException se)
                errorMessage = se.getMessage();
                return false;
            catch(IllegalAccessException iae)
                errorMessage = iae.getMessage();
            return false;
        return true;
    private static Object locateBrowser()
        if(browser != null)
            return browser;
        switch(jvm)
        case 0: // '\0'
            try
                Integer finderCreatorCode = (Integer)makeOSType.invoke(null, new Object[] {
                    "MACS"
                Object aeTarget = aeTargetConstructor.newInstance(new Object[] {
                    finderCreatorCode
                Integer gurlType = (Integer)makeOSType.invoke(null, new Object[] {
                    "GURL"
                Object appleEvent = appleEventConstructor.newInstance(new Object[] {
                    gurlType, gurlType, aeTarget, kAutoGenerateReturnID, kAnyTransactionID
                return appleEvent;
            catch(IllegalAccessException iae)
                browser = null;
                errorMessage = iae.getMessage();
                return browser;
            catch(InstantiationException ie)
                browser = null;
                errorMessage = ie.getMessage();
                return browser;
            catch(InvocationTargetException ite)
                browser = null;
                errorMessage = ite.getMessage();
                return browser;
        case 1: // '\001'
            File systemFolder;
            try
                systemFolder = (File)findFolder.invoke(null, new Object[] {
                    kSystemFolderType
            catch(IllegalArgumentException iare)
                browser = null;
                errorMessage = iare.getMessage();
                return browser;
            catch(IllegalAccessException iae)
                browser = null;
                errorMessage = iae.getMessage();
                return browser;
            catch(InvocationTargetException ite)
                browser = null;
                errorMessage = ite.getTargetException().getClass() + ": " + ite.getTargetException().getMessage();
                return browser;
            String systemFolderFiles[] = systemFolder.list();
            for(int i = 0; i < systemFolderFiles.length; i++)
                try
                    File file = new File(systemFolder, systemFolderFiles);
if(file.isFile())
Object fileType = getFileType.invoke(null, new Object[] {
file
if("FNDR".equals(fileType.toString()))
browser = file.toString();
return browser;
catch(IllegalArgumentException iare)
browser = browser;
errorMessage = iare.getMessage();
return null;
catch(IllegalAccessException iae)
browser = null;
errorMessage = iae.getMessage();
return browser;
catch(InvocationTargetException ite)
browser = null;
errorMessage = ite.getTargetException().getClass() + ": " + ite.getTargetException().getMessage();
return browser;
browser = null;
break;
case 2: // '\002'
browser = "cmd.exe";
break;
case 3: // '\003'
browser = "command.com";
break;
case -1:
default:
browser = "netscape";
break;
return browser;
public static void openURL(String url)
throws IOException
if(!loadedWithoutErrors)
throw new IOException("Exception in finding browser: " + errorMessage);
Object browser = locateBrowser();
if(browser == null)
throw new IOException("Unable to locate browser: " + errorMessage);
switch(jvm)
case 0: // '\0'
Object aeDesc = null;
try
try
aeDesc = aeDescConstructor.newInstance(new Object[] {
url
putParameter.invoke(browser, new Object[] {
keyDirectObject, aeDesc
sendNoReply.invoke(browser, new Object[0]);
catch(InvocationTargetException ite)
throw new IOException("InvocationTargetException while creating AEDesc: " + ite.getMessage());
catch(IllegalAccessException iae)
throw new IOException("IllegalAccessException while building AppleEvent: " + iae.getMessage());
catch(InstantiationException ie)
throw new IOException("InstantiationException while creating AEDesc: " + ie.getMessage());
break;
finally
aeDesc = null;
browser = null;
case 1: // '\001'
Runtime.getRuntime().exec(new String[] {
(String)browser, url
break;
case 2: // '\002'
case 3: // '\003'
Runtime.getRuntime().exec(new String[] {
(String)browser, "/c", "start", url
break;
case -1:
Process process = Runtime.getRuntime().exec((String)browser + " -remote 'openURL(" + url + ")'");
try
int exitCode = process.waitFor();
if(exitCode != 0)
Runtime.getRuntime().exec(new String[] {
(String)browser, url
catch(InterruptedException ie)
throw new IOException("InterruptedException while launching browser: " + ie.getMessage());
break;
default:
Runtime.getRuntime().exec(new String[] {
(String)browser, url
break;
static
loadedWithoutErrors = true;
String osName = System.getProperty("os.name");
if("Mac OS".equals(osName))
String mrjVersion = System.getProperty("mrj.version");
String majorMRJVersion = mrjVersion.substring(0, 3);
try
double version = Double.valueOf(majorMRJVersion).doubleValue();
if(version == 2D)
jvm = 0;
} else
if(version >= 2.1000000000000001D)
jvm = 1;
} else
loadedWithoutErrors = false;
errorMessage = "Unsupported MRJ version: " + version;
catch(NumberFormatException numberformatexception)
loadedWithoutErrors = false;
errorMessage = "Invalid MRJ version: " + mrjVersion;
} else
if(osName.startsWith("Windows"))
if(osName.indexOf("9") != -1)
jvm = 3;
} else
jvm = 2;
} else
jvm = -1;
if(loadedWithoutErrors)
loadedWithoutErrors = loadClasses();
suck my balls

Satelitte P200-1BA - Internet browser activity stops

Hello,
I have a big problem with internet activity on WLAN connection.
Configuration:
Comp: Satelitte P200-1BA .
System: Vista Home Premium OEM with SP1 and last upgrades.
Internet Browsers: Mozilla Firefox, IE, Safari.
Router: FRITZ Box 7050.
Communicators: Skype, Gadu-gadu
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After system booting - WLAN internet connection start automaticaly in next step commumicators are starting.
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Hi
You are using the WLan but did you notice the same using the LAN?
According to your posting the chat applications like gadu-gadu and Skype are automatically loading in the OS background.
In your case I would test if the IE and other internet browsers would hang without usig and loading gadu gadu and Skype.
Furthermore if this issue appears only using the WLan then you should update the WLan driver and should also check if the BIOS is up to date.
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A R C:\source\java\Markov\readonly.out
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at java.io.FileOutputStream.<init>(Unknown Source)
at java.io.FileOutputStream.<init>(Unknown Source)
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APPHANGB1 when browsing the web, or just keeping it open. Happens once in a 5 minutes, and it freezes for 30 seconds. I found many people who have this problem too ....

Odds are only someone that develops apps for iOS would have access to whatever this is and, even then, this information may still not be available.
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I resolved my battery issues (more or less) by disabling the "set date/time automatically" setting. I haven't re-enabled it yet but my battery life has been much better with it off.
~Lyssa

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Scott

You try a Different Browser: Dolphin HD, Chrome, F.F., Etc See if one of them works Scott.. i know on mine when i visit the Motorola Site it always want me to Convert back to Mobile..

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So a number of months ago (5, I believe) Safari Web Browser crashed and I tried opening it and a message popped up that said:
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Hi,
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C:\Documents and Settings\YourUsername\Application Data\Apple Computer\Safari\
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Servlet throws IOException when browser is "stopped"

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