FreeBSD Server Panics & Reboots

[Joseph Begumisa]

I have a freebsd server in data center that keeps rebooting every 7 hours 
or so with the following messages from /var/run/dmesg.boot

pid 2962 (httpd), uid 80: exited on signal 11
pid 2955 (httpd), uid 80: exited on signal 11
pid 2997 (httpd), uid 80: exited on signal 11
pid 3038 (httpd), uid 80: exited on signal 11
pid 2879 (httpd), uid 80: exited on signal 11
pid 3209 (httpd), uid 80: exited on signal 11
pid 3330 (httpd), uid 80: exited on signal 4
pid 2872 (httpd), uid 80: exited on signal 11
pid 3417 (httpd), uid 80: exited on signal 11


Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0xffffff8f
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc035dc58
stack pointer           = 0x10:0xe4c53e7c
frame pointer           = 0x10:0xe4c53e84
code segment            = base 0x0, limit 0xfffff, type 0x1b
                         = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 3655 (httpd)
interrupt mask          = none
trap number             = 12
panic: page fault


The output from uname -a  is as follows:

[root at web] ~ $> uname -a
FreeBSD web.trueafrican.com 4.11-STABLE FreeBSD 4.11-STABLE #1: Sat Jan 22 
13:13:09 GMT 2005     root at web.trueafrican.com:/usr/src/sys/compile/WEB-TA 
i386


The basic machine details are:

CPU: Intel(R) Pentium(R) 4 CPU 2.00GHz (1992.63-MHz 686-class CPU)
   Origin = "GenuineIntel"  Id = 0xf24  Stepping = 4

Features=0x3febfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,S
SE2,SS,HTT,TM>
real memory  = 1073676288 (1048512K bytes)
avail memory = 1039589376 (1015224K bytes)


I dont think it is a hard disk issue since the hard disks were replaced 
recently.  Probably cpu fan malfunction? Anyone seen anything like this?

Thanks.

Joseph.