Date: Sun, 16 Nov 2008 10:10:36 +0000 (UTC) From: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> To: Lorenzo Perone <lopez.on.the.lists@yellowspace.net> Cc: freebsd-jail@freebsd.org, freebsd-stable@freebsd.org Subject: Re: hangs for 7.1-PRE [was: problem possibly related to multi-ip jail patch?] Message-ID: <20081116100529.Y61259@maildrop.int.zabbadoz.net> In-Reply-To: <2192B50F-16AE-4BC8-ACEC-6C5B99804DA0@yellowspace.net> References: <2192B50F-16AE-4BC8-ACEC-6C5B99804DA0@yellowspace.net>
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On Sun, 16 Nov 2008, Lorenzo Perone wrote: Hi, > I've been experiencing problems with one of the machines running FreeBSD > 7.1-PRERELEASE #2: Thu Oct 16 20:23:09 CEST 2008 with the multi-ip patch > bz_jail7-20080920-01-at150161.diff, and I'm wondering if it possibly related > to the patch - in any case, any advice would be very welcome. bottom line is that most of this looks less likely to be a jail problem. > It happens that mysql (tried both 4.0 and 5.1, in 2 separate jails), at some > time stop responding to connections, and mysql gets stuck in sbwait state. It > is only killable with kill -9 <pid> Yeah, I had been seeing mysql hang or go to 99% CPU for years once in a while; it's been more rare the last months. I have seen it in- and outside of jails, with or without patches. You could try to see if you can get backtraces of those processes. > each of the two mysqlds is running in a jail on one private IP, serving > connections to a webserver nearby - the latter having one public and one > private IP, communicating with the other jail via the private network. > > I also experienced two complete system hangs (which must not be necessarily > related to the mysql problem) both during a shutdown -r now. one was a panic, > in another case the machine was still pingable but did not shut down > completely. I could only reset it over the DRAC. here's a screenshot I made > over the Dell RAC: http://lorenzo.yellowspace.net/stuck.png Looking at your image I see more problems before the shutdown so this as well is most likely not a jail problem. > Since I'm also using zfs there and the kernel has been built with the DTRACE > options. > > any advice (also about which more details that I should/could provide) would > be very welcome... I am Cc:ing the answer to stable@ and setting reply-to: to move the discussion there. /bz -- Bjoern A. Zeeb Stop bit received. Insert coin for new game.
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