What is Dolphin?  What OS are you on?  What version of Java are you running from Help->[Support Information]?

ADS makes a Java API call to Open based on the OS.

Dolphin is the default filemanager in KDE.

 License Key: CC0E7017582F6D65890EE767D86EAFDF8CF1DC10856EB4D5****************

You are using the "icedtea" JVM which is not adequate to run ADS.  Please run ADS with datastudio-bundled.sh to use the bundled JRE which is the Sun JRE.  With this you probably will not have this issue.

Hm, you are right it is not reproducible on Oracle JVM, which i have too:

ADS will try to use java.awt.Desktop.open().  If it is not supported it will try kde-open.

How you determine java.awt.Desktop.open() is supported or not? Just catch exception and as fallback call execute external command? And why kde-open instead of standard DE-independent xdg-open?

We do this ...

        try {
            if(Desktop.isDesktopSupported()) {
                Desktop.getDesktop().open(f);
                return;
            }
        } catch(Exception e) {
            log.err(e);
        }
        
        try {
            String cmd = "/usr/bin/xdg-open";
            if(new File(cmd).exists()) {
                Runtime.getRuntime().exec(new String[] { cmd, path });
                return;
            }
        } catch(Exception e) {
            log.err(e);
        }
        
        try {
            String cmd = "/usr/bin/gnome-open";
            if(new File(cmd).exists()) {
                Runtime.getRuntime().exec(new String[] { cmd, path });
                return;
            }
        } catch(Exception e) {
            log.err(e);
        }
        
        try {
            String cmd = "/usr/bin/kde-open";
            if(new File(cmd).exists()) {
                Runtime.getRuntime().exec(new String[] { cmd, path });
                return;
            }
        } catch(Exception e) {
            log.err(e);
        }
 

Thank you very much for the info.

I've report it to our openjdk maintainers: https://bugzilla.redhat.com/show_bug.cgi?id=810849