While verifying another bug, http://java.net/jira/browse/GLASSFISH-14310, I encountered an issue where launch link was bringing a 404 page. Steps to reproduce:
1. In Admin Console go to update tool and click on Available Add-Ons.
2. Choose an add-on and click Install.
3. Without restarting server go to an already deployed application and click on Launch link - 404 error is displayed instead of expected application's links. The url displayed in the browser is:
instead of the regular url when things work that's:
Restarting server clears this problem.