Someone's not doing something right. I don't know who it is. If you have
both the Jboss and Resin plugins installed, and you setup a module to first
use Jboss, run the module, stop, go add a new resin instance, and try to
switch it to Jboss, the configuration screen goes completely blank and just
sits there. If you close that window anyway, you'll see that the resin
plugin still has the little red Fix It icon at the bottom right, if you try
to click that again, then you get the same behavior.
The only way around this is to deinstall the Jboss plugin and restart idea,
at which point you go back in setup the resin plugin properly and all is
well from there.
I suspect the added jboss deployment descriptor is not getting yanked from
the configuration or something, causing the whole process to hang, but
that's a guess and the only thing different about the jboss plugin. I don't
get this problem with Tomcat/Resin switching.