[Zope] zope 2.8.5 becomes unresponsive.

[Erik Myllymaki]

Environment is RHEL 3, Zope v2.8.5 (Python 2.3.5).

Every couple of days the zope instance will become unresponsive and require a 
restart. ZMI is inaccessible at these times so I have to do run "service 
my_zope_service restart" in the usual redhat way.

There is nothing in the logs, and if I do "service y_zope_service status" I am 
told "program running; pid=22671"

This is a service under very light load.

I viewed the chanelog for v2.8.6 and didn't see any changes that address this, 
and for various reasons I do not want to move into the v2.9.x builds.

Any guidance appreciated.