My server gets kernel panic every 7th day

[Daniel Johansson]

Okay, is this hard to do? I've no idea how to look at the dump or how
to understand the dump. You don't have to be kernel hacker to
understand that?

On Mon, 20 Dec 2004 09:08:01 +1030, Greg 'groggy' Lehey
<grog at freebsd.org> wrote:
> On Sunday, 19 December 2004 at 23:35:18 +0100, Daniel Johansson wrote:
> > On Mon, 20 Dec 2004 08:59:19 +1030, Greg 'groggy' Lehey
> > <grog at freebsd.org> wrote:
> >> On Saturday, 18 December 2004 at 11:50:02 -0800, Kris Kennaway wrote:
> >>> On Sat, Dec 18, 2004 at 11:57:35AM +0100, Daniel Johansson wrote:
> >>>> Hi, i've had my server up for over a year now and it's been rock solid
> >>>> but for the latest weeks the server has rebooted evert Saturday at
> >>>> exact 04:19:57 because of a find command. I have no idea why and I've
> >>>> checked the cron log and I don't think any crontab is runned at that
> >>>> time. Not as far as I can see from the cron log. Anyway find makes the
> >>>> server get a kernel panic and it reboots. This is the fourth week in a
> >>>> row it happens and I've checked the hardware, no problems at all.
> >>>
> >>> How did you "check the hardware"?  Hardware failure is by far the
> >>> most common cause of "strange panics under abnormal load [such as
> >>> when the weekly cron job runs]".
> >>
> >> If this panic occurs repeatedly under certain circumstances, it's
> >> probably not hardware.  Anyway, there's not much point standing
> >> outside and scratching our heads.  We have a facility for analysing
> >> this kind of problem: the processor dump and kernel debugger.
> >
> > Yeah, I want to say thank you for your help. I think I've been able to
> > reproduce the kernel panic now, finalay!
> >
> > On my server I run 3 jails and every night at 04:15 when it runs
> > periodic weekly it runs it in 3 jails + the host enviroment. This
> > seems to cause the kernel panic, I don't really know why yet. I can
> > run periodic weekly separatly in every jail + the host without kernel
> > panic but when I run it at the same time on all places it kernel
> > panics.
> 
> What does the dump backtrace show?
> 
> > It can still be the PSU, don't have any other atm to try with. I'll
> > do some more testing and see if I can get any more info.
> 
> There's no point looking at the hardware until you've looked at the
> dump.
> 
> Greg
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> 
>