Can't run via Java Web Start

Hello Everyone,
I'm new to Java Web Start. I've been trying to get the BuddySpace Jabber client to launch via JWS. I have to use the trusted mode since I need local filesystem and network access. So, I've signed the three jar files and finally gotten the application to launch but I'm getting an exception that I don't get when running it without JWS (i.e. just using a batch file to launch from my local machine). Here is the error that I get:
java.lang.NullPointerException
     at javax.swing.ImageIcon.<init>(Unknown Source)
     at edu.ou.kmi.buddyspace.gui.BSSplashScreenDlg.initComponents(BSSplashScreenDlg.java:49)
     at edu.ou.kmi.buddyspace.gui.BSSplashScreenDlg.<init>(BSSplashScreenDlg.java:39)
     at edu.ou.kmi.buddyspace.gui.BSMainFrame.<init>(BSMainFrame.java:310)
     at edu.ou.kmi.buddyspace.gui.BSMainFrame.main(BSMainFrame.java:423)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
     at java.lang.reflect.Method.invoke(Unknown Source)
     at com.sun.javaws.Launcher.executeApplication(Unknown Source)
     at com.sun.javaws.Launcher.executeMainClass(Unknown Source)
     at com.sun.javaws.Launcher.continueLaunch(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(Unknown Source)
Any help on how to resolve this would be greatly appreciated.
Thanks,
Al

Looks like your app can't find the image file for the icon. Make sure you've got your images in your jar file.
Also have a look on the forums for info about ClassLoader's...there's a bug with ClassLoader.getResource() which you may be using.
Simon

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Thanks

Hi There.
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799037 wrote:
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Missing class ServerNamingNode_WLStub using Java Web Start

Hi!
We're developing J2EE application with Swing clients. Our Swing
applications work perfectly standalone but fail when distributed via
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found. I've looked through all the WL installation directory and
couldn't find it too.
Maybe somebody knows where can I find this class? Or maybe why JWS
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Thank you in advance.
Below you can see a stacktrace.
P.S. Standalone client works perfectly using only weblogic.jar archive.
Java Web Start 1.2 Console, started Tue Sep 24 15:22:08 EEST 2002
Java 2 Runtime Environment: Version 1.4.1 by Sun Microsystems Inc.
Logging to file: C:\Documents and Settings\pawlom\My Documents\webstart.log
http://localhost:7001/ws/
java.lang.ClassNotFoundException:
weblogic.jndi.internal.ServerNamingNode_WLStub
at com.sun.jnlp.JNLPClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.jnlp.JNLPClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:140)
at
weblogic.jndi.WLInitialContextFactoryDelegate.newRootNamingNodeStub(WLInitialContextFactoryDelegate.java:479)
at
weblogic.jndi.WLInitialContextFactoryDelegate.newRemoteContext(WLInitialContextFactoryDelegate.java:452)
at
weblogic.jndi.WLInitialContextFactoryDelegate.newContext(WLInitialContextFactoryDelegate.java:372)
at
weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:339)
at
weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:221)
at
weblogic.jndi.WLInitialContextFactory.getInitialContext(WLInitialContextFactory.java:149)
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:662)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:243)
at javax.naming.InitialContext.init(InitialContext.java:219)
at javax.naming.InitialContext.<init>(InitialContext.java:195)
at net.xtrim.crm.ui.delegates.util.Util.getContext(Util.java:64)
at
net.xtrim.crm.ui.delegates.UserSessionDelegate.<init>(UserSessionDelegate.java:84)
at
net.xtrim.crm.ui.delegates.UserSessionDelegate.login(UserSessionDelegate.java:62)
at
net.xtrim.crm.ui.adminconsole.AdminConsole$ConsoleAuthenticator.authenticate(Unknown
Source)
at net.xtrim.crm.ui.adminconsole.auth.DialogLogin.login(Unknown Source)
at net.xtrim.crm.ui.adminconsole.auth.DialogLogin.access$000(Unknown Source)
at
net.xtrim.crm.ui.adminconsole.auth.DialogLogin$LoginThread.run(Unknown
Source)
--------------- nested within: ------------------
weblogic.utils.AssertionError: ***** ASSERTION FAILED ***** - with
nested exception:
[java.lang.ClassNotFoundException:
weblogic.jndi.internal.ServerNamingNode_WLStub]
at
weblogic.jndi.WLInitialContextFactoryDelegate.newRootNamingNodeStub(WLInitialContextFactoryDelegate.java:483)
at
weblogic.jndi.WLInitialContextFactoryDelegate.newRemoteContext(WLInitialContextFactoryDelegate.java:452)
at
weblogic.jndi.WLInitialContextFactoryDelegate.newContext(WLInitialContextFactoryDelegate.java:372)
at
weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:339)
at
weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:221)
at
weblogic.jndi.WLInitialContextFactory.getInitialContext(WLInitialContextFactory.java:149)
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:662)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:243)
at javax.naming.InitialContext.init(InitialContext.java:219)
at javax.naming.InitialContext.<init>(InitialContext.java:195)
at net.xtrim.crm.ui.delegates.util.Util.getContext(Util.java:64)
at
net.xtrim.crm.ui.delegates.UserSessionDelegate.<init>(UserSessionDelegate.java:84)
at
net.xtrim.crm.ui.delegates.UserSessionDelegate.login(UserSessionDelegate.java:62)
at
net.xtrim.crm.ui.adminconsole.AdminConsole$ConsoleAuthenticator.authenticate(Unknown
Source)
at net.xtrim.crm.ui.adminconsole.auth.DialogLogin.login(Unknown Source)
at net.xtrim.crm.ui.adminconsole.auth.DialogLogin.access$000(Unknown Source)
at
net.xtrim.crm.ui.adminconsole.auth.DialogLogin$LoginThread.run(Unknown
Source)
java.lang.ClassNotFoundException:
weblogic.jndi.internal.ServerNamingNode_WLStub
at com.sun.jnlp.JNLPClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.jnlp.JNLPClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:140)
at
weblogic.jndi.WLInitialContextFactoryDelegate.newRootNamingNodeStub(WLInitialContextFactoryDelegate.java:479)
at
weblogic.jndi.WLInitialContextFactoryDelegate.newRemoteContext(WLInitialContextFactoryDelegate.java:452)
at
weblogic.jndi.WLInitialContextFactoryDelegate.newContext(WLInitialContextFactoryDelegate.java:372)
at
weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:339)
at
weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:221)
at
weblogic.jndi.WLInitialContextFactory.getInitialContext(WLInitialContextFactory.java:149)
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:662)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:243)
at javax.naming.InitialContext.init(InitialContext.java:219)
at javax.naming.InitialContext.<init>(InitialContext.java:195)
at net.xtrim.crm.ui.delegates.util.Util.getContext(Util.java:64)
at
net.xtrim.crm.ui.delegates.UserSessionDelegate.<init>(UserSessionDelegate.java:84)
at
net.xtrim.crm.ui.delegates.UserSessionDelegate.login(UserSessionDelegate.java:62)
at
net.xtrim.crm.ui.adminconsole.AdminConsole$ConsoleAuthenticator.authenticate(Unknown
Source)
at net.xtrim.crm.ui.adminconsole.auth.DialogLogin.login(Unknown Source)
at net.xtrim.crm.ui.adminconsole.auth.DialogLogin.access$000(Unknown Source)
at
net.xtrim.crm.ui.adminconsole.auth.DialogLogin$LoginThread.run(Unknown
Source)
--------------- nested within: ------------------
weblogic.utils.AssertionError: ***** ASSERTION FAILED ***** - with
nested exception:
[java.lang.ClassNotFoundException:
weblogic.jndi.internal.ServerNamingNode_WLStub]
at
weblogic.jndi.WLInitialContextFactoryDelegate.newRootNamingNodeStub(WLInitialContextFactoryDelegate.java:483)
at
weblogic.jndi.WLInitialContextFactoryDelegate.newRemoteContext(WLInitialContextFactoryDelegate.java:452)
at
weblogic.jndi.WLInitialContextFactoryDelegate.newContext(WLInitialContextFactoryDelegate.java:372)
at
weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:339)
at
weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:221)
at
weblogic.jndi.WLInitialContextFactory.getInitialContext(WLInitialContextFactory.java:149)
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:662)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:243)
at javax.naming.

Maybe this link can get your started:
http://www.esus.com/javaindex/j2se/javawebstart/plugingetstarted.html
Cheers,
Joris

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Java Web Start fans and experts:
We have been using Java Web Start to deploy the client side of a CORBA-based application since the inception of Java Web Start ... including Java Web Start 1.0 right up through the present.
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Here is the summary of my results from a Linux box running various JREs, various versions of Java Web Start, and also running as a non-JWS deployed application. I've listed the length of the stringified IOR in each case.
JRE 1.5.0 non-JWS client: stringified IOR length = 344
JRE 1.6.0 non-JWS client: stringified IOR length = 344 ... this, I think, excludes the JRE as the cause of these problems.
Java WS 1.5.0, JRE 1.5.0 JWS client: stringified IOR length = 344
Java WS 1.5.0, JRE 1.6.0 JWS client: stringified IOR length = 344
Java WS 1.6.0, JRE 1.6.0 JWS client: stringified IOR length = 1568
Java WS 1.6.0, JRE 1.5.0 JWS cleint: stringified IOR length = 1568
In all cases, the stringified IOR length is determined by the service receiving the message and is always running JRE 1_5_9_09 and is
always the same 344 characters in length UNLESS it was deployed
using Java Web Start 1_6_0, in which case it in nearly 5 times as big!
To me, it sure looks as if there is a problem with Java Web Start 1_6_0 to be adding so much to the stringified IOR. Note: it's hard to tell how different the underlying IOR is in the JWS 1_6_0 case because, unlike most other ORBs, the Sun ORB doesn't have a tool to extract the IOR into a human readable structure. However, I can think of no good reason why the identical application deployed using Java Web Start 1_6_0 should have a stringified IOR length that is different than that of the same application deployed in non-JWS form or should differ from the behavior seen in all previous releases of Java Web Start.
Any clues or suggestions? Has anyone else observed this behavior?
Thanks,
John

Hi.
I got a different problem. My Corba application works in JRE 1.6, but doesn't works in JRE 1.5.X. I got an unexpected error and my console shows:
getSubjectX500Principal NoSuchMethodError: java.lang NoSuchMethodError
#### Java Web Start Error:
#### null
Can you help me?

Looking up EJB from Java Web start

I have a java client application that looks-up an EJB deployed in WebLogic Server 10.3 on windows xp. the application works fine when invoked from command line. But when I try to run the same application via Java Web Start, I get following error while doing EJB lookup:
java.lang.AssertionError: java.lang.ClassNotFoundException: com.pks.dummy.SL1
at weblogic.ejb.container.internal.RemoteBusinessIntfGenerator.generateRemoteInterface(RemoteBusinessIntfGenerator.java:57)
at weblogic.ejb.container.internal.RemoteBusinessIntfProxy.readObject(RemoteBusinessIntfProxy.java:205)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at java.io.ObjectStreamClass.invokeReadObject(Unknown Source)
at java.io.ObjectInputStream.readSerialData(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
at java.io.ObjectInputStream.readSerialData(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
at weblogic.utils.io.ChunkedObjectInputStream.readObject(ChunkedObjectInputStream.java:197)
at weblogic.rjvm.MsgAbbrevInputStream.readObject(MsgAbbrevInputStream.java:564)
at weblogic.utils.io.ChunkedObjectInputStream.readObject(ChunkedObjectInputStream.java:193)
at weblogic.rmi.internal.ObjectIO.readObject(ObjectIO.java:62)
at weblogic.rjvm.ResponseImpl.unmarshalReturn(ResponseImpl.java:240)
at weblogic.rmi.cluster.ClusterableRemoteRef.invoke(ClusterableRemoteRef.java:348)
at weblogic.rmi.cluster.ClusterableRemoteRef.invoke(ClusterableRemoteRef.java:259)
at weblogic.jndi.internal.ServerNamingNode_1030_WLStub.lookup(Unknown Source)
at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:392)
at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:380)
at javax.naming.InitialContext.lookup(Unknown Source)
at com.pks.dummy.client.TestClientDummy.doTest(Unknown Source)
at com.pks.dummy.client.TestClientDummy.main(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.sun.javaws.Launcher.executeApplication(Unknown Source)
at com.sun.javaws.Launcher.executeMainClass(Unknown Source)
at com.sun.javaws.Launcher.doLaunchApp(Unknown Source)
at com.sun.javaws.Launcher.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: com.pks.dummy.SL1
at weblogic.ejb.container.deployer.RemoteBizIntfClassLoader.getClassBytes(RemoteBizIntfClassLoader.java:151)
at weblogic.ejb.container.deployer.RemoteBizIntfClassLoader.loadClass(RemoteBizIntfClassLoader.java:96)
at weblogic.ejb.container.internal.RemoteBusinessIntfGenerator.generateRemoteInterface(RemoteBusinessIntfGenerator.java:54)
... 36 more
#### Java Web Start Error:
#### null
com.pks.dummy.SL1 is Remote interface for the Session Bean. and is packaged in same jar with client jar. Also, I am able to instantiate the com.pks.dummy.SL1 using class.forName in main() method of client code in both command line as well as Web start environment.
Any help is appreciated. Thanks.
Edited by: javaDev on Dec 19, 2008 11:58 AM
Edited by: javaDev on Dec 19, 2008 12:18 PM

I got the solution for ClassNotFound issue. To avoid this error, one need to package EJB stubs on client side. Packaging just the EJB interfaces doesn't help.
EJB stubs can be generated using weblogic.appc utility. For more information about this utility please refer
WebLogic Server Command Reference : Link: [http://edocs.bea.com/wls/docs103/pdf/admin_ref.pdf]

Refresh an open web page on closing an applet launch from Java Web Start

Hi
I launch an aplication via Java Web Start from a link in a web page. I am looking to a solution to refresh my web page when I close my applet.
Thanks in advance to give me the solution or only to let me know if it's possible or not.

everything's possible. but this is not trivial. there is no direct connection between the html page that launched the app and the app. You can create an indirect connection by having the app notify a server process when it closes and having the page periodically polling the server for the app's status.

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Dear All,
I am a beginner in java2d, please excuse if what I am asking is not your standards. My problem is that I am using a swing application that is delivered to a client machine through the webstart. It is a medical Image viewer(usually DICOM images of size 10~15 MB) . I am using windows XP in my client machines. My graphics card is 'Intel(R) 82865G Graphics controller' and installed with the latesr driver from the intel web site. My current problems are:
1. I tried starting the opengl through the command line using the option java -Dsun.java2d.opengl=True MyApp. My application started however the verbose says opengl could not be started. The message is as follows:
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Regards,
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Custom classloader fails when using Java Web Start

Hope you can help me with a problem that is driving me nuts. I have implemented my own classloader to support plugins. This classloader works as follows:
1. The classloader is configured to access a plugin components jar file downloaded by jws.
2. The plugin components jar file contains other jar files which contains the actual plugin code to be loaded using my own classloader.
3. Upon initialization - my classloader extracts all jar files contained in the plugin components jar file into temporary files.
4. These temporary files are used by my classloader when defining plugin classes.
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>
After a while (it was able to load some of the classes) it fails with the following stack-trace:
Regards,
Terje
java.security.AccessControlException: access denied (java.io.FilePermission C:\DOCUME~1\TEOES\LOCALS~1\Temp\activity61102.jar read)
     at java.security.AccessControlContext.checkPermission(Unknown Source)
     at java.security.AccessController.checkPermission(Unknown Source)
     at java.lang.SecurityManager.checkPermission(Unknown Source)
     at java.lang.SecurityManager.checkRead(Unknown Source)
     at java.util.zip.ZipFile.<init>(Unknown Source)
     at java.util.jar.JarFile.<init>(Unknown Source)
     at java.util.jar.JarFile.<init>(Unknown Source)
     at my.plugin.ActivityClassLoader.getJarFileEntry(ActivityClassLoader.java:258)
     at my.plugin.ActivityClassLoader.search(ActivityClassLoader.java:244)
     at my.plugin.ActivityClassLoader.loadClass(ActivityClassLoader.java:99)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClassInternal(Unknown Source)
Does anyone have source code for implementing a simple class loader that can be used with Java Web Start (preferrably with all jar files to be used by the classloader wrapped into a jar file)

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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