Hi,
Are you trying to deploy the application from NetBeans 6.8? or have you started Glassfish v3 domain from NetBeans 6.8?
I had a similar problem when I deployed an application client from NetBeans 6.8, because the IDE did a "directory deployment" (instead of deploying the EAR file). I think directory deployment of "application clients" is not supported by Glassfish v3, yet (issue:
https://glassfish.dev.java.net/issues/show_bug.cgi?id=11071).
After that problem, the server didn't work correctly until I undeployed the application, and STOPped the Glassfish domain...
By another side, I also had problems to launch application clients when I start Glassfish v3 from NetBeans IDE 6.8 (sometimes it worked at first, but after restarting IDE or the Glassfish server, the application client fails to launch).... So I recommend to manually start the Glassfish v3 domain (with the command "asadmin start-domain"), and deploy the application client from Glassfish administrative console in EAR/JAR formats (but not in directory format).
In this way, I can always launch the application clients correctly ... (from Glassfish console, browser, and javaws command).
But I don't sign the application JARs (because Glassfish server already does it for me).
Good luck.
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