I am getting the following error which is RANDOM. Restarting Apache solves the problem.
[Fri Jan 02 16:19:21.854040 2015] [mpm_prefork:notice] [pid 18591] AH00169: caught SIGTERM, shutting down
[Fri Jan 02 16:19:22.872284 2015] [suexec:notice] [pid 11172] AH01232: suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Fri Jan 02 16:19:22.904651 2015] [auth_digest:notice] [pid 11173] AH01757: generating secret for digest authentication ...
[Fri Jan 02 16:19:22.905293 2015] [lbmethod_heartbeat:notice] [pid 11173] AH02282: No slotmem from mod_heartmonitor
How can I find out what's causing this?