Date: Wed, 01 Oct 2003 15:14:23 -0400 From: Mike Tancsa <mike@sentex.net> To: bv@wjv.com, freebsd-stable@freebsd.org Subject: Re: panics on 24 hour boundaries Message-ID: <6.0.0.22.0.20031001150923.08460910@209.112.4.2> In-Reply-To: <20031001190312.GC21705@wjv.com> References: <20031001180521.C9CDF16A4F2@hub.freebsd.org> <20031001190312.GC21705@wjv.com>
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Actually, one note on this, I had a server that was panicing similar to this that DES was kind enough to look at a while ago. The problem was never tracked down, but I found that taking INET6 out of the kernel solved the problem. I asked michael@gargantuan.com if this was possible to try, and he said they make heavy use of INET6 so they could not take it out. The other user seeing similar crashes (tss@reflection.co.jp) also makes use of INET6. It could of course be total coincidence and have nothing to do with it. ---Mike At 03:03 PM 01/10/2003, Bill Vermillion wrote: >On Wed, Oct 01, 2003 at 11:05 , Men gasped, women >fainted, and small children were reduced to tears as >freebsd-stable-request@freebsd.org confessed to all: > > > Message: 18 > > Date: Tue, 30 Sep 2003 23:19:34 -0400 > > From: "Michael W. Oliver" <michael@gargantuan.com> > > Subject: Re: panics on 24 hour boundaries > >[severly edited - wjv] > > > +--- On Tuesday, September 30, 2003 22:35 --- > > | Robert Watson proclaimed: > > > | Initial reactions: panics on 24 hour boundaries are, in my > > | experience, often associated with the daily event. Once a > > | day, the daily scripts run find several times on your file > > | systems, causing every file and directory to be inspected > > | for changes in setuid scripts, etc. This can trigger certain > > | classes of race conditions and resource limits that you might > > | otherwise not hit in normal operation -- and conviently, they > > | run 24 hours apart :-). To try and confirm this suspicion, > > | it would be interesting to know what time of day exactly the > > | panics take place, and whether you can reproduce the panic by > > | manually running the daily or security script. > > > All of the panics happened in the evening hours, between 1800 > > and 2200 EDT. I am also able to successfully run the daily > > periodic scripts at any time of the day without issue. > >One part in this thread said the panics happened 24 hours after >reboot and that would imply something in scripts that depend upon >a length of time being powered up. > >However if all the pnaics occur in the 1800-2200 time frame >this could be caused by an external event. > >It could be any large device on the same electric circuits you are >on. By the 'same circuit' I mean anyone and/or anything connected >to the same power transformer. In a residential area this could be >several houses. > >Anything that could put a spike on the line could cuase this. >And even if the computer if filter and on a UPS if any device >connected to the computer is not also on the same filter those >could be the culprits. I've seen [in the far past when I >maintained many machines with serial terminal] terminals and also >printers cause this. > >One place had contruction going on next door and that was alway >in early afternoon when one piece of equipment was fired up. > >And one of the legendary stories is about the systems that paniced >every day between noon and about 10 after. That was traced to a >microwave in the lunchroom. > >It's been my experience that often time related crashes are >external to the machines involved unless each and everything >connected to the machine is coming from the same filterer/protected >source, including all phone lines for DSL and or cable. > >Bill > > End of freebsd-stable Digest, Vol 28, Issue 4 > > >-- >Bill Vermillion - bv @ wjv . com >_______________________________________________ >freebsd-stable@freebsd.org mailing list >http://lists.freebsd.org/mailman/listinfo/freebsd-stable >To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org"
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