Date: Tue, 07 Oct 2008 14:41:36 +0200 From: Bartosz Stec <admin@kkip.pl> To: freebsd-stable@freebsd.org Subject: Re: reloading samba config made system unresponsible Message-ID: <48EB5900.7040103@kkip.pl> In-Reply-To: <48EA1FD2.5080402@kkip.pl>
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Bartosz Stec wrote:
> My tries to tune smb.conf to achieve better performance expose very
> strange bug:
> Just executing:
>
> /usr/local/etc/rc.d/samba reload
>
> made my system unresponsible from network. It happens three times
> until now so I'm sure that is the cause (but it happened after some
> succesful reloads a couple of minutes earlier, so it's not happening
> all the time command is executed).
> Symptoms:
>
> - machine only responding to ping requests
> - ssh session shows, that config reload was succesful, and that's
> last thing showed (no shell after message)
> - can't connect with another ssh session, but no refuse nor timeout
> - on local console system seems responsible (alt +[1-9] works), but
> any try to login cause it to wait forever for password prompt
> - no kernel or error message on screen, and nothing suspicious in logs
> - alt+ctrl+del does nothing
> - pressing power button and waiting for system to shutdown does
> nothing
> - hard reset was the only way
> - after first restart I've made full fsck and started rebuilding
> gmirror - when machine hangs second time rebuilding doesn't stop
>
> I'm not a developer but it looks like some kind of deadlock? Note that
> changes I made to smb.conf was only in socket options.
>
Update:
The true reason of this was a filesystem - I've noticed some strange
kernel message about "old format snaphot". Fsck didn't found any fs
error, so I just deleted all snapshots from /usr. Problem is gone now.
Note that snapshots were about 2 months old so it's still scary :)
Sorry for confusion.
--
Bartosz Stec
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