We have removed the backtrace support from Hunchentoot because we wanted to get rid of all non-essential system dependencies. For interactive debugging, the *BREAK-ON-SIGNALS* special variable can (should) be used, it can do what the presented acceptor subclass can do. If you really need backtraces in your log files, the trivial-backtrace [2] library may be useful.
It would be useful to have a section on debugging in the manual.
-Hans
[1] http://www.ai.mit.edu/projects/iiip/doc/CommonLISP/HyperSpec/Body/var_stbrea... [2] http://common-lisp.net/project/trivial-backtrace/