recording execution for debugging question (AppSight alternative?)

[Avni...@gmail.com]

i have a windows service that executes perfectly when debugging. when
installed on a production server, the service crashes a few times a
day no exception or anything similar. my service logs everything it
does (including exceptions) and nothing is logged. out of the blue the
service just starts again and the event log says that the service
terminated unexpectedly. i have set up the service settings in windows
so that the service is automatically restarted so the customers don't
know there is a problem. however i still do want to crack the reason
for the crashes.

the only reason i know that a service would crash without any
exception is if there is somewhere a stack overflow but i have no idea
where to look (especially since i am also using two 3rd party
components) (again as i said this all works perfectly in development)

to solve this i am looking for a debugging application that will be
able to record what the service does and how it executes (i will
install a debug compile on the production server so all pdb files are
there). i do NOT want logging since i already have that and the log
does not help me to find this specific problem. i know of 1
application that does exactly this (called AppSight by BMC) however it
costs at least $30K and that is way over our budget. after the
recording is finished i want to be able to replay/view what was going
on exactly before the service crashed

does any one know of an application that will help me debug this
problem?

thanks in advance
Dani Avni