FreeBSD 8.0-STABLE & mpd -> system freeze

[Mikolaj Golub]

On Sun, 2 May 2010 12:46:19 +0200 (CEST) Roar Pettersen wrote:

> Upgraded some servers from 7.2-stabel to 8.0-stable early april and
> since then I have seen stability problems with 8.0 servers which use
> mpd (vpn).
> I have tried several mpd version (5.5, 5.3 and 5.1), but the system freeze
> within 6 hours or 3-5 days. Early in april we got typical watchdog timeout
> error message just before the system freeze, but now we don't get any
> error message.

Could you try disabling flowtable to see if it helps?

sysctl -w net.inet.flowtable.enable=0

> Sometimes we also see that the mpd process goes into a none killeable
> stauts, and then when I execute a "shutdown -r" the system hang with
> this message :
>
> stopping mpd5
> Waiting for PIDS : 114830 second watchdog timeout expired. Shutdown terminated.
> Apr 29 21:04:52 init : some process would not die; ps axl advised
> Waiting (max 60 seconds) for system process 'vnlru' to stop...

Could you provide the output of

procstat -kk <mpdpid>

when this happens again or even better:

procstat -akk

-- 
Mikolaj Golub