Comment #5 on issue 2114 by jean.deruelle: In B2b servlet, after re-INVITE, and try to create CANCEL will get "final response already sent!" exception.
http://code.google.com/p/mobicents/issues/detail?id=2114
Fix available from nightly snapshot here http://hudson.jboss.org/hudson/view/Mobicents/job/MobicentsSipServletsRelease/ can you try it out and revert back to us ?
