Java web start doesn't launch

Question

On my Windows 7 x64 machine, I'm having problems launching my remotely deployed Web Start app (the Web Start app launches correctly on another PC as expected). In IE or FF, I click on the web start launch link, the JNLP is downloaded, it seems to get executed and nothing happens. I see javaws.exe processes running. I don't see a java.exe running.

I don't know if it's related but I also can't get the java console to run. In the Control Panel Java applet settings, I have have enabled "Show console" and "place Java icon in the system tray". I don't see the Java icon in the system tray either.

I'm running Java 1.6.0_21 (32 bit). I'm able to run Netbeans so the it appears as if Java is installed correctly on my machine. Why isn't web start working?

Answer 1

A firewall on my corporate joined domain was the problem. It was preventing web start as well as other types of apps from working correctly or even launching. Opening ports resolved it.

Answer 2

Are you absolutely certain that your Windows browser is binding the JNLP suffix to the javaws executable?

If you download the file, and double click, does it open correctly? If not, then right click, and investigate what is presented under Open With...

Answer 3

I had the same symptoms when I switched JNLP specifiction to 6.0. So I simply solved it by going back to 1.5, which I think is default in NetBeans, at least up til 6.7.

<jnlp spec="6.0+"...