I have two web projects. One for tomcat and one for glassfish. 
- put a breakpoing on the index.jsp in project for tomcat and start debugging
- wait until the breakpoing in the index.jsp is reached.
- try to start the project for glassfish in debug mode -> RunTime exception is
arrised and this message appears in the output window for the web application:

/space/ide/projects/WebApplication52/nbproject/build-impl.xml:504: Deployment error:
The Admin Server is stopped at a Break Point. No calls can be executed.
Please, complete your debugging session (continue) in order to be able to manage
this server instance.
See the server log for details.


This is problem, when you want to debug two web projects on different servers
(for example : one includes ws and second one is client of this ws).