Bjoern A. Zeeb
2008-Nov-16 02:15 UTC
hangs for 7.1-PRE [was: problem possibly related to multi-ip jail patch?]
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.pngLooking 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.