Java Web Start crashes when I'm offline

I'm using java web start 1.0.1_01 on windows NT 4.0
I've downloaded an application on my laptop and it works fine.
I'd like to make a demo of the application while I'm offline (this appli has the <offline-allowed /> tag in its jnlp).
The problem is that java web start crashes when I try to start it offline: I get a dialog box saying:
"Splash: sysCreateListenerSocket failed" instead of the usual splash screen.
Any ideas...?

There is a little plug at the bottom of the webstart console. Have you tried clicking on that plug? Make sure it is not like this
---<>---
you want it like
---<= =>---
Then try starting it up. If that doesn't work try doing the same thing with an application that doesn't have the <offline-allowed/> tag? Does it fail in the same way? My guess is that it is trying to compare versions or communicate back with the server that you installed the app from, and it's failing because you are not connected.
charlie

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Dear Patrick,
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I had taken all the measures you had mentioned in your previous replies. But I am not able to view the report. ( might be it is not compiliing)
I am using new version of jasperreports-0.5.3.jar
also through console it is running well.
Also it is not giving any errors. can u have any idea about this.
Might be it is silly mistake I have done.
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Fully install Java Web Start on Wds !

Hi,
i'm using install Anywhere 5.0.5 !
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Java Web Start(the program itself) doesn't start in offline mode

Hi,
My Java Web Start doesn't start when my internet connection is not on??? I have a program that needs also offline access so it's crucial to get JWS work without internet connection as well.
The problem might be in those sun's example programs you can't remove? Maybe the program crashes when trying to get some information for those programs?
(please read the question well. My problem IS NOT in the .jnlp-files <offline-allowed/>)
And by the way those sun's demo programs that are supposed to start in offline mode(Internet connection not required) don't start even if you have started them once with the connection on.....
-orainio

I have the SAME problem -
BUT....
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Screen Saver crashing my Java Web Start app

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>
I've written a Java Web Start ... . The only problem is that there are a couple of people who from time to time find that the application has crashed when they unlock their Windows screen saver. >What screensaver(s)? Some important distinctions might be
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Java console doesn't launch when starting Java Web Start app from Firefox

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IlaneMarie wrote:
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http://forum.java.sun.com/thread.jspa?threadID=5116970&messageID=9402346#9402346
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Microsoft suggested (among others) two test.
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Thanks
Jes�s

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The classloader works fine when not using java web start. Then I launch the application using java web start with security policy in .jnlp file set to:
<security>
<all-permissions/>
</security>
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Regards,
Terje
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If you implement your own classloader, and then still run with a SecurityManager installed, then your ClossLoader is responsible for asigning the permissions to the code it loads.
You need your ClassLoader to extend SecureClassLoader, and implement the method :
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When we starting IR and ID, it will look for java web start platform? why?

When we starting IR and ID, it will look for java web start platform? why?

hi praveen,
Java web start is platform to launch the java application.
All the file from the central server are copied to the local machine
check the below blog
Java Web Start
Have some more Fun.......
regards
kummari

HT5651 When I execute Java Web Start, I get an error "Java Web Start cannot be opened because of an error " I am running OSX 10.6.8 and Java Update 13. Anyone know why ?

Error :

I still have the problem. This is the error:
Process:         Java Web Start [2760]
Path:            /Users/Admin/UTILITIES/Java/Java Web Start.app/Contents/MacOS/Java Web Start
Identifier:      com.apple.JavaWebStart
Version:         12.2.0 (12.2.0)
Build Info:      JavaApplicationSupport-1450000~1
Code Type:       X86-64 (Native)
Parent Process: launchd [127]
Date/Time:       2013-02-21 17:49:43.369 -0500
OS Version:      Mac OS X 10.6.8 (10K549)
Report Version: 6
Interval Since Last Report:          2712 sec
Crashes Since Last Report:           3
Per-App Crashes Since Last Report:   3
Anonymous UUID:                      383BDFCF-9AA2-4B81-828C-6AD5615B5474
Exception Type: EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000002, 0x0000000000000000
Crashed Thread: 4
Dyld Error Message:
Symbol not found: _JVMGetLatestJVMInfo
Referenced from: /Users/Admin/UTILITIES/Java/Java Web Start.app/Contents/MacOS/Java Web Start
Expected in: /System/Library/Frameworks/JavaVM.framework/Versions/A/JavaVM

Custom Policy implementation when using Java Web Start.

Hi,
I hope it's okay for me to make a 'look here' type of post.
I'm having some trouble related to JAAS and Java Web Start and have made a post about it in the Web Start forums. I haven't had much luck in the Web Start forums and I don't want to make a duplicate post here, so here's a link:
http://forum.java.sun.com/thread.jspa?threadID=756178
If anyone has any suggestions please reply in the Web Start thread.
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You need your ClassLoader to extend SecureClassLoader, and implement the method :
SecureClassLoader.getPermissions(CodeSource cs) to return the PermissionCollection you want.
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I have created one Java web-start plugin application in swing which is launched from PHP site at browser plugin.
All things were working fine, but when we implemented SSL in our site it stopped working. And when we try to start the application from browser it thorws error like:
Unable to launch Application.
In Java console it puts following log:
JNLP Ref (...): NULL !
#### Java Web Start Error:
#### null
Following is my JNLP file:
<jnlp spec="1.0+" codebase="https://<<server_domain>>/MyPlugin/">
<information>
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    <vendor>The Java(tm) Tutorial</vendor>
    <homepage href="null"/>
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    <description kind="short">Test Plugin</description>
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</information>
<security>
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</security>
<update check="timeout" policy="always"/>
<resources>
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The issue started only after implementation of SSL in our site. Please provide any solution for this. Many thanks in advance.
P.S. My Jar file is signed by third party authorized certificate.

Have you tried using Rosetta?

Not getting application in Java Web Start

Hello Sir,
I wanted to run an application using Java Web Start. So, I created a jnlp file and i have mentioned the necessary jar files and the main class file. when I clicked on the jnlp file, the application is running in the Server using Java Web Start and its shortcuts are creates on the desktop and in the startmenu. I am able to run the application by clicking on the shortcut in the server. But I am unable to Download the application in the Java Web Start. It is not showing any Error Messages and the application is not running in the cleint machines.
The contents of the jnlp file is as follows.
<?xml version="1.0" encoding="utf-8"?>

<jnlp
spec="1.0+"
codebase="http://dev01/Dummy/New"
href="SimpleClass.jnlp">
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<title>SimpleClass Demo Application</title>
<vendor>xxx</vendor>

<description>SimpleClass Demo </description>
<description kind="short">A demo of Class A and Class B Dependencies in java Web Start.</description>


<offline-allowed/>
</information>
<security>
<all-permissions/>
</security>
<resources>
<j2se version="1.4.0"/>
<jar href="ClassLib.jar"/>
</resources>
<application-desc main-class="A"/>
</jnlp>
So, please Tell me how to solve this problem.
Thanking you
R.Venkatesh
MakeLogic
www.makelogic.com
[email protected]

Here is an example of my JNLP file that works.
<?xml version="1.0" encoding="utf-8"?>

<jnlp spec="1.0+" codebase="http://application:8080/application/" href="passport.jnlp">
<information>
    <title>Passport</title>
    <vendor>WIM Consulting</vendor>
    <homepage href="http://www.wim.ca"/>
    <description>application Passport.</description>
    <description kind="short">Passport</description>
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    <icon href="WIMsplash.jpg" kind="splash"/>
    <offline-allowed/>
</information>
<security>
    <all-permissions/>
</security>
<resources>
    <j2se version="1.4+"/>
    <jar href="passport.jar"/>
    <jar href="jars/kunststoff.jar"/>
    <jar href="jars/ldapsec.jar"/>
    <jar href="jars/localedata.jar"/>
    <jar href="jars/mysql-connector-java-3.0.6-stable-bin.jar"/>
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<application-desc main-class="ca.wim.passport.startup"/>
</jnlp>I am not sure what the problem is.
"I am unable to Download the application in the Java Web Start"
If webstart in not actually downloading the jar - is the jar in the correct location?
Is the server named dev01 and the directory structure actually /Dummy/New?
Note: you do need to set up the mine type JNLP on your server,
In my case the location of the JNLP file and main jar file passport is in the following directory.
c:\Inetpub\WIMRoot\application
The additional jars are in
c:\Inetpub\WIMRoot\application
I hope this may give you some clue
rykk

Problems to download with java web start

Hola to all.
I have the following problem. My application not discharge of the server when you exist a new version. The application runs off line but when exist a new version must download the last version, is the idea.
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I leave you the launch.jnlp file.
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+" codebase="http://XXX/sis/elpaso/" href="launch.jnlp">
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        <title>El Paso</title>
        <vendor>XXX</vendor>
        <homepage href="http://XXX/"/>
        <description>Sistema comercial de la empresa "El Paso".</description>
        <description kind="short">El Paso</description>
        <icon href="elpaso32.png" kind="default"/>
        <offline-allowed/>
        <shortcut online="false">
                         <desktop/>
                         <menu submenu="Sistemas XXX\El Paso"/>
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                    <related-content href="setup.jnlp">
                         <title>Configurar El Paso</title>
                         <description>Configuracion del sistema comercial de la empresa "El Paso"</description>
                         <icon href="elpasoSetup32.png" kind="default"/>
                         <offline-allowed/>
                         <shortcut online="false">
                              <desktop/>
                              <menu submenu="Sistemas XXX\El Paso"/>
                         </shortcut>
                    </related-content>
    </information>
    <security>
        <all-permissions/>
    </security>
    <update check="timeout" policy="always"/>
    <resources>
        <j2se version="1.6+"/>
        <extension name="jnlpcomponent1" href="jnlpcomponent1.jnlp"/>
    </resources>
    <application-desc main-class="elPaso.Main">
    </application-desc>
</jnlp>

The launch file seems invalid. Try checking it, and the entire launch, using JaNeLA.

First Timer Need Help using Java Web Start

                    The following Error Message was thrown when I tried to launch an app
          using Java Web Start...
An error occurred while launching/running the application.
Title: Swing Application - Hello World
Vendor: Ramanujam
Category: Download Error
Bad MIME type returned from server when accessing resource: http:\\localhost:8000\test/SimpleExample.jnlp - text/html
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<?xml version="1.0" encoding="utf-8"?>

<jnlp codebase="http:\\localhost:8000\test" href="SimpleExample.jnlp">
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          <description>Test JWS</description>
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          <offline-allowed/>
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</jnlp>
               The exception thrown :
NLPException[category: Download Error : Exception: null : LaunchDesc: null ]
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     at com.sun.javaws.cache.DownloadProtocol.isLaunchFileUpdateAvailable(Unknown Source)
     at com.sun.javaws.LaunchDownload.getUpdatedLaunchDesc(Unknown Source)
     at com.sun.javaws.Launcher.downloadResources(Unknown Source)
     at com.sun.javaws.Launcher.handleApplicationDesc(Unknown Source)
     at com.sun.javaws.Launcher.handleLaunchFile(Unknown Source)
     at com.sun.javaws.Launcher.run(Unknown Source)
     at java.lang.Thread.run(Thread.java:536)
Also, How to configure MIME mapping for .jnlp files on J2EE server (I do not have another server) and if there is a need, how do i deploy the jar and the jnlp file on J2EE server?
Kindly help.....

Hi,
I have the same problem, but I do have configured the webserver (Apache 2) correctly and the server is NOT returning a 404 error.
To check this I used the a tcp monitor (Apache Axis).
The error message in Java Webstart is identical to the one discribed above.
In the tcp monitor I see the following :
HTTP/1.1 200 OK
Date: Tue, 19 Nov 2002 15:16:57 GMT
Server: Apache/2.0.43 (Win32)
Last-Modified: Tue, 19 Nov 2002 15:13:58 GMT
ETag: "44eb-300-bebdba39"
Accept-Ranges: bytes
Content-Length: 768
Keep-Alive: timeout=15, max=97
Connection: Keep-Alive
Content-Type: application/x-java-jnlp-file
<?xml version="1.0" encoding="utf-8"?>
<jnlp spec="1.0+" codebase="http://ns003:88/ns" href="jviews.jnlp">
<information>
<title>JViews TWD Demo Applicatie</title>
<vendor>Cap Gemini Ernst & Young</vendor>
<homepage href="default.html"/>
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<resources>
<j2se version="1.3"/>
<jar href="jviewsapplet.jar"/>
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<application-desc main-class="JViewsClient"/>
</jnlp>
Any idea?
Cheers, Joost

Java Web Start crashes when I'm offline

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