ant process fails to relinquish debug port

hi

when I'm doing remote debugging on a grails app using port 5005 and the JDK settings that are suggested by the configurations editor when creating a new remote configuration.

when I run the ant target from IDEA the debugging works, but when I stop the process and restart the port is still in use. even if I stop IDEA the port is still taken.

if I leave it for an hour or so it seems to relinquish the port. if I run the ant target from the command line then stop it, the problem does not occur. (but I've had problems getting the debugger to work when running ant in a separate process.)

any ideas?

I'm on Selena 7821, Jetgroovy 1.6.16466, Sun jdk 1.6, Ubuntu hardy

thanks, best

hamish