Karakun Support Forums

Did you specify FXWebStartLaunche in your Jnlp file?

By remote PC do you mean that the server hosting the jnlp file is on one machine and you are accessing the jnlp file by its url from another machine? https://openwebstart.com/docs/FAQ.html#_how_to_run_openjfx_based_javafx_applications_with_openwebstart As the above doc says you will have to wrap you...

We may consider this in the next release (sometime in November). However, you can also setup your own JVM Download Server that hosts Java17 JRE as described in guide https://openwebstart.com/docs/OWSGuide. ... oad_server

As far as OWS is concerned so far we have no reports of any issues of Apps started by OWS using Java 17.

OWS is used to run the Java application that is specified in the Jnlp file. All the resources that are required by the application must be specified in the Jnlp file so that OWS can fetch them and start the application. If your application is a Spring boot application then you must specify all the r...

We will try to fix this in the next release.

You can store/import the certificate in the trust store <UserHome>\.config\icedtea-web\security\trusted.cacerts using the itw-settings.exe > Cetificates > Import

https://board.karakun.com/viewtopic.php?p=9136#p9136

Do you get this dialog even after you run the application once after choosing "Always trust content from the pubisher"?

Also see https://board.karakun.com/viewtopic.php?p=9136#p9136

OWS is not working when the Jnlp application is run with JDK 18. OWS is using the class SecurityManager which seems to have been removed from JDK 18. https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/SecurityManager.html We will investigate this. Thanks for pointing out this err...

Hi, In a Terminal server environment where there are going to be many users you can choose to have a System wide configuration for OWS: https://openwebstart.com/docs/OWSGuide.html#_system_configuration Within this you can Customize Application Cache and User Config Location. You can have a central l...

https://board.karakun.com/viewtopic.php ... lash#p9279

https://openwebstart.com/docs/OWSGuide. ... s_overview

You can install a JRE locally and in itw-settings you can add that local JRE to OWS's list of JVMs. You can control the download of JVMs by OWS using the Update Strategy of JVM Manager Configuration. Usethe strategy "Do not download any version" to prevent OWS from downloading any JVM. Not...

> I am creating my jnlp on the fly on the client side

Does your main jar contain signed jnlp?

Please see the documentation on signed jnlp at https://docs.oracle.com/javase/7/docs/t ... dJNLP.html

> Caused by: net.sourceforge.jnlp.LaunchException: Fatal: Application Error: Cannot grant permissions to unsigned jars. Application requested security permissions, but jars are not signed.

Please make sure that jars are signed.

Doing this kind of thing would have security concerns. We don't think this would be possible.

This is not an OWS issue. You should install OWS on your machine such that all the users that need to use have proper access rights as OWS tries to temporarily store downloaded resources and cache them. For this it requires necessary access rights to the system.

itw-settings is a simple Java Swing based app.

You should set up your display properly to be able to run a Java Swing app.

It seems that Swing is not finding a display and thus giving HeadlessException.

please read OWS documentation for log files : https://openwebstart.com/docs/OWSGuide.html

Please send the OWS logs and make sure that all jars specified in the Jnlp file are signed and signed with the same certificate

Please do a search https://www.google.com/search?client=f ... outHandler .

You may find some solution. It seems this class is not longer supported after Java 8.