Mongrel Dies

Hey guys!

A problem popped up today with Mongrel. Its process continues to die
and I seem can't locate the reason. Logs are clear, and PID is left
untouched, but the process is gone. Currently I'm pinging a server
over and over to spot the moment the process leaves to get even the
slightest clue as to what's going on.

I'm not a newbie, but it puzzles me much. Any advice where to look?
Maybe someone saw this before? Forums and Google search are of little
help so far.

Ruby 1.8.4 / Rails 1.2.3 / Mongrel 1.0.1

The application uses Ferret 0.11.4 and Sphinx.

Thanks,
Aleksey