Hi! Starting yesterday I'm experiencing machine freezes on a 6.2-R system (remote to me). The strange thing: It occurs twice a day, in the morning hours (both freezes are within 1-2 hours) and for the rest of the day everything runs fine. The machine does not respond anymore (no net, no keyboard interaction) but does not panic. The hardware is a Dell PE-750 and is running for the last 4 years w/o any trouble. It's a gateway system (border router, mail hub etc. etc.) and is also running IPSec tunnels and a poptop server for road clients. My first thought is a hardware problem but why does it occur that less and only in the morning? My next thought is a DoS attack (CVE-2007-0244?) but can that lead into a machine freeze? Is anybody else seeing freezes these days? FreeBSD 6.2-RELEASE-p1 #0: Sun Feb 11 22:35:18 CET 2007 i386 Volker
Volker wrote:> My first thought is a hardware problem but why does it occur that less > and only in the morning? My next thought is a DoS attack > (CVE-2007-0244?) but can that lead into a machine freeze?When in the morning? If it's around 3-4 am, that's when the (often hardware intensive) default cron jobs kick in. -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 250 bytes Desc: OpenPGP digital signature Url : http://lists.freebsd.org/pipermail/freebsd-stable/attachments/20070522/03af27af/signature.pgp
On Tuesday 22 May 2007 08:15, Volker wrote:> Hi! > > Starting yesterday I'm experiencing machine freezes on a 6.2-R > system (remote to me). The strange thing: It occurs twice a day, in > the morning hours (both freezes are within 1-2 hours) and for the > rest of the day everything runs fine. > > The machine does not respond anymore (no net, no keyboard > interaction) but does not panic.We also have been experiencing the same type of behavior (as explained in a previous post). freeze times vary throughout the day. However, if we have no network connections attached to the box, It stays up consistantly. Could you take it off your network and see if it still freezes up ?
On Wed, May 23, 2007 at 02:57:59PM -0500, Roger Miranda wrote:> On Tuesday 22 May 2007 14:03, Kris Kennaway wrote: > > > > > What happens if you enable INVARIANTS and/or WITNESS? > > > I have enabled WITNESS, I have no experienced a freeze yet. But i did notice > on boot an WITNESS message for if_bridge. > > See attached. Could this be causing the freeze?Possibly, the point of WITNESS is to detect possible deadlock conditions that can cause hangs at runtime so it may well have succeeded to do its job here. Kris