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Weekly unexpected system shut-down/crash - IIS/PHP5/Postgres

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macca

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Nov 18, 2009, 5:38:42 AM11/18/09
to
HI,

This is a bit of a conundrum. I have a windows 2003 server running
IIS6, PHP5 as a module and postgreSQL. There isnt much else running on
the system.

For some reason the system shuts down unexpectedly on Sundays!

I have checked the IIS error logs. The httperr2.log seems to have many
5_connections_refused logs.
Postgres log shows nothing.
Windows system log just says "The previous system shutdown at 07:37:34
on 08/11/2009 was unexpected" and nothing for the week after.

Does anybody have any ideas what may cause this setup to crash on
Sundays?


Thanks.

Andrew Morton

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Nov 18, 2009, 5:16:10 PM11/18/09
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> Does anybody have any ideas what may cause this setup to crash on
> Sundays?

Perhaps you could narrow down the suspects...

What day does the cleaner come in?

Is the machine on a UPS which records power outages?

Are there any scheduled tasks on Sundays?

> Windows system log just says "The previous system shutdown at
> 07:37:34 on 08/11/2009 was unexpected" and nothing for
> the week after.

As in there are no entries in the system log after that, or there are no
more unexpected shutdowns during the week?

--
Andrew

Jeffrey Ingalls

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Nov 18, 2009, 8:56:02 PM11/18/09
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A server crashing on specific time periods tells us that there's a scheduled
process causing problems. This may be something like AntiVirus scheduled to
update its engine and dats, Backup software running during this period, UPS
software, a Windows scheduled task or custom applications/services running
during the time. Although the BIOS and device drivers can cause a crash, the
fact that it is crashing on a specif time period points us to those other
candidates.

Event 6008 is logged when "the previous shutdown was unexpected" and can
help you pin down the exact time. I tell you this because as administrators
we often have many things going on during the Sunday maintenance window.

The times I've had to troubleshoot a "scheduled" crash, it has always been
3rd party software like AV or a custom application.

All the best,
Jeffrey Ingalls


"macca" wrote:

> .
>

macca

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Nov 19, 2009, 6:06:37 AM11/19/09
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On 18 Nov, 22:16, "Andrew Morton" <a...@in-press.co.uk.invalid> wrote:
> > Does anybody have any ideas what may cause this setup to crash on
> > Sundays?
>
> Perhaps you could narrow down the suspects...
>
> What day does the cleaner come in?

Not the problem. I wish it was that simple!

> Is the machine on a UPS which records power outages?

There is no power outage. The host machine stays running. The windows
server is a vm.

> Are there any scheduled tasks on Sundays?

Nope.

> > Windows system log just says "The previous system shutdown at
> > 07:37:34 on 08/11/2009 was unexpected" and nothing for
> > the week after.
>
> As in there are no entries in the system log after that, or there are no
> more unexpected shutdowns during the week?

There are no more unexpected shutdowns.

> --
> Andrew

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