server shuts itself down daily for no apparent reason
I am about at my wits end trying to figure out why my dedicated web server is shutting itself down daily. sometimes two or three times a day. Server is using latest version of apache, centos 5.7 and latest update of cpanel/whm. There are no ontoward scripts running on it as this server has been only recently provisioned and I've only transferred in a few client accounts which had operated for years on the server I am phasing out. They're pretty simply web hosting accounts so nothing going on there.
The apache error log doesn't seem to reveal anything at all. I put in a ticket had cpanel look at this and they couldn't find anything.
there is no crash shown in last nor a reboot command seen it appears the server is being started from a powered off state.
So I had the NOC check all the hardware and they even replaced the power supply and heat sink even though they swear everything checked out fine.
I installed sys-snap to see if I can see anything after it reboots again. I don't find anything obvious.
But I am not an expert so maybe I am missing something here. The only thing that seems to happen repeatedly prior to the shutdown and that seemed to have started up about the time this problem began is:
ipaliases failed @ Tue Nov 15 17:43:30 2011. A restart was attempted automagically. Service Check Method: [check command] Number of Restart Attempts: 1 Cmd Service Check Raw Output: ipaliases has missing ips
I've researched on that and cannot find anything helpful.
So wondering if anyone here has any ideas, suggestions or anything else that might lead me to a solution. Appreciate the response.