More info (was Re: 4.11 panic every 23 hours 55 minutes or so)
On Sun, May 17, 2009 at 07:06:57AM -0400, Doug Lee wrote: One of the weirder things I've seen in a while here... OS: FreeBSD 4.11 (yeah I know, old, but generally stable) CPU: Intel(R) Pentium(R) 4 CPU 2.00GHz real memory = 536608768 (524032K bytes) Hds: IDE Problem: Ever since a suspitious power outage (I say suspitious because we think a surge was also involved), this box has been exhibiting kernel panics about every 23 hours 55 minutes, give or take about 4 minutes either way. Obviously hardware is suspect, and hopefully in line for upgrade; but as FreeBSD has always proven so stable for me, I'm curious what on earth could cause this sort of regular panic? It's not time of day; if I reboot at 2:00 AM, 3:55 PM, or any other time, it's 23:55 or so later I get a panic, whenever that may be. I think this rules out cron jobs, external attacks, and load-based issues. Update: I killed mysqld, four nfsiods, Apache2, mpd, and maybe a couple more no-longer-needed processes two mornings ago. I also disabled them at that time in rc.conf. the next morning, the system restarted with a panic as usual, BUT... This morning, on the first boot that never ran all those processes, I have not seen a restart yet, and we're at 1 day 1 hour as I speak. I looked in /var/at earlier in the week and never found any scheduled jobs. It shouldn't be Cron, since it's sensitive to boot time, not clock time. Is there some way one of those processes, like mysqld, could be scheduling an event to occur 24 hours after launch, without using `at', and without having to be running 24 hours later? Example: Could mysqld schedule something without `at' that will run 24 hours after mysqld starts even if mysqld is no longer running? Also, is it even possible that any process could cause a kernel-mode page fault without there being damaged hardware? Example: Could some mysql file be so corrupt that it would panic a perfectly fine machine? I should hope not, but I wonder. -- Doug Lee d...@dlee.orghttp://www.dlee.org SSB BART Group doug@ssbbartgroup.com http://www.ssbbartgroup.com When there is no enemy within, the enemies outside cannot hurt you. --African Proverb ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: 4.11 panic every 23 hours 55 minutes or so
On Sun, May 17, 2009 at 2:06 PM, Doug Lee d...@dlee.org wrote: One of the weirder things I've seen in a while here... OS: FreeBSD 4.11 (yeah I know, old, but generally stable) CPU: Intel(R) Pentium(R) 4 CPU 2.00GHz real memory = 536608768 (524032K bytes) Hds: IDE Problem: Ever since a suspitious power outage (I say suspitious because we think a surge was also involved), this box has been exhibiting kernel panics about every 23 hours 55 minutes, give or take about 4 minutes either way. Is there something in the cron that runs at around that time? -- Best regards, Odhiambo WASHINGTON, Nairobi,KE +254733744121/+254722743223 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Clothes make the man. Naked people have little or no influence on society. -- Mark Twain ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: 4.11 panic every 23 hours 55 minutes or so
On Sun, May 17, 2009 at 10:38 AM, Mark ad...@asarian-host.net wrote: -Original Message- From: owner-freebsd-questi...@freebsd.org [mailto:owner-freebsd-questi...@freebsd.org] On Behalf Of Mark Tinguely Sent: zondag 17 mei 2009 17:30 To: d...@dlee.org Cc: freebsd-questions@freebsd.org Subject: Re: 4.11 panic every 23 hours 55 minutes or so Why does the panic happen 24 hours after the last reboot; who knows and one may never know. Are you finally hitting, the bad RAM? Are you finally getting the computer over-warm to act up? Or running a heavy process around the time of the panic, which may (now) draw too much power for his seemingly damaged (PSU|DDR[12]|MOTHERBARD|WHATEVER)? - Mark MySQL displayed the most processor time in your top output-- have you checked it for daily maint jobs, like index rebuilds? ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: 4.11 panic every 23 hours 55 minutes or so
On Sun, May 17, 2009 at 7:06 AM, Doug Lee d...@dlee.org wrote: One of the weirder things I've seen in a while here... OS: FreeBSD 4.11 (yeah I know, old, but generally stable) CPU: Intel(R) Pentium(R) 4 CPU 2.00GHz real memory = 536608768 (524032K bytes) Hds: IDE Do you by chance have the kernel built with debugging enabled? Problem: Ever since a suspitious power outage (I say suspitious because we think a surge was also involved), this box has been exhibiting kernel panics about every 23 hours 55 minutes, give or take about 4 minutes either way. Obviously hardware is suspect, and hopefully in line for upgrade; but as FreeBSD has always proven so stable for me, I'm curious what on earth could cause this sort of regular panic? It's not time of day; if I reboot at 2:00 AM, 3:55 PM, or any other time, it's 23:55 or so later I get a panic, whenever that may be. I think this rules out cron jobs, external attacks, and load-based issues. Perhaps a bad CMOS battery causing the system time to become corrupted? (I know it's a long shot...) -- Glen Barber ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: 4.11 panic every 23 hours 55 minutes or so
On Sun, May 17, 2009 at 07:39:46AM -0400, Glen Barber wrote: On Sun, May 17, 2009 at 7:06 AM, Doug Lee d...@dlee.org wrote: One of the weirder things I've seen in a while here... OS: FreeBSD 4.11 (yeah I know, old, but generally stable) CPU: Intel(R) Pentium(R) 4 CPU 2.00GHz real memory ?= 536608768 (524032K bytes) Hds: IDE Do you by chance have the kernel built with debugging enabled? Afraid not, nor much space in / for that. I partitioned this system before /modules arrived, and I barely have enough space in / now (about 3 meg free). That shouldn't affect this issue though; I do have separate /usr, /var, and /tmp. I do mount /tmp and /var/run via MFS. Problem: ?Ever since a suspitious power outage (I say suspitious because we think a surge was also involved), this box has been exhibiting kernel panics about every 23 hours 55 minutes, give or take about 4 minutes either way. ?Obviously hardware is suspect, and hopefully in line for upgrade; but as FreeBSD has always proven so stable for me, I'm curious what on earth could cause this sort of regular panic? It's not time of day; if I reboot at 2:00 AM, 3:55 PM, or any other time, it's 23:55 or so later I get a panic, whenever that may be. I think this rules out cron jobs, external attacks, and load-based issues. Perhaps a bad CMOS battery causing the system time to become corrupted? (I know it's a long shot...) Interesting idea, though I'd be surprised since I think the system time is set via ntpd, is it not? `date' seems to recover nicely every time anyway. A power surge could indeed play with CMOS though... but how would I test for this while the system is running? -- Doug Lee d...@dlee.orghttp://www.dlee.org SSB BART Group doug@ssbbartgroup.com http://www.ssbbartgroup.com Pray devoutly, but hammer stoutly. --Sir William G. Benham ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: 4.11 panic every 23 hours 55 minutes or so
On Sun, May 17, 2009 at 9:13 AM, Doug Lee d...@dlee.org wrote: On Sun, May 17, 2009 at 07:39:46AM -0400, Glen Barber wrote: On Sun, May 17, 2009 at 7:06 AM, Doug Lee d...@dlee.org wrote: One of the weirder things I've seen in a while here... OS: FreeBSD 4.11 (yeah I know, old, but generally stable) CPU: Intel(R) Pentium(R) 4 CPU 2.00GHz real memory ?= 536608768 (524032K bytes) Hds: IDE Do you by chance have the kernel built with debugging enabled? Afraid not, nor much space in / for that. I partitioned this system before /modules arrived, and I barely have enough space in / now (about 3 meg free). That shouldn't affect this issue though; I do have separate /usr, /var, and /tmp. I do mount /tmp and /var/run via MFS. Problem: ?Ever since a suspitious power outage (I say suspitious because we think a surge was also involved), this box has been exhibiting kernel panics about every 23 hours 55 minutes, give or take about 4 minutes either way. ?Obviously hardware is suspect, and hopefully in line for upgrade; but as FreeBSD has always proven so stable for me, I'm curious what on earth could cause this sort of regular panic? It's not time of day; if I reboot at 2:00 AM, 3:55 PM, or any other time, it's 23:55 or so later I get a panic, whenever that may be. I think this rules out cron jobs, external attacks, and load-based issues. Perhaps a bad CMOS battery causing the system time to become corrupted? (I know it's a long shot...) Interesting idea, though I'd be surprised since I think the system time is set via ntpd, is it not? `date' seems to recover nicely every time anyway. A power surge could indeed play with CMOS though... but how would I test for this while the system is running? -- Doug Lee d...@dlee.orghttp://www.dlee.org SSB BART Group doug@ssbbartgroup.com http://www.ssbbartgroup.com Pray devoutly, but hammer stoutly. --Sir William G. Benham Another problem may be as follows : I am living an area nearby to industrial factories . When they are started or stopped . they are causing important fluctuation in my home current in such a way that even uninterruptible power supplies are becoming not able to balance their effects . Such an effect may be present in your area . In that hour regularly such a system may start and cause a current fluctuation that it may boot your computer(s) . Thank you very much . Mehmet Erol Sanliturk ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: 4.11 panic every 23 hours 55 minutes or so
On Sun, May 17, 2009 at 09:42:05AM -0400, Mehmet Erol Sanliturk wrote: Another problem may be as follows : I am living an area nearby to industrial factories . When they are started or stopped . they are causing important fluctuation in my home current in such a way that even uninterruptible power supplies are becoming not able to balance their effects . Such an effect may be present in your area . In that hour regularly such a system may start and cause a current fluctuation that it may boot your computer(s) . That might explain the initial surge (UPSes are indeed in effect in this office), but it won't explain the panics themselves, since they clearly occur relative to boot time, not to real time. -- Doug Lee d...@dlee.orghttp://www.dlee.org SSB BART Group doug@ssbbartgroup.com http://www.ssbbartgroup.com Nearly all men can stand adversity, but if you want to test a man's character, give him power. -Abraham Lincoln ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: 4.11 panic every 23 hours 55 minutes or so
Trap 12 are usually hardware related many times RAM. Since it happened after bad power, I would besides testing your RAM but make sure your power supply and fans are operating normally. Why does the panic happen 24 hours after the last reboot; who knows and one may never know. Are you finally hitting, the bad RAM? Are you finally getting the computer over-warm to act up? --Mark. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
RE: 4.11 panic every 23 hours 55 minutes or so
-Original Message- From: owner-freebsd-questi...@freebsd.org [mailto:owner-freebsd-questi...@freebsd.org] On Behalf Of Mark Tinguely Sent: zondag 17 mei 2009 17:30 To: d...@dlee.org Cc: freebsd-questions@freebsd.org Subject: Re: 4.11 panic every 23 hours 55 minutes or so Why does the panic happen 24 hours after the last reboot; who knows and one may never know. Are you finally hitting, the bad RAM? Are you finally getting the computer over-warm to act up? Or running a heavy process around the time of the panic, which may (now) draw too much power for his seemingly damaged (PSU|DDR[12]|MOTHERBARD|WHATEVER)? - Mark ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
