Re: [Nbd] nbd-server hanging issue

["JaniD++" <djani22@...60...>]

----- Original Message ----- 
From: "Wouter Verhelst" <wouter@...3...>
To: "JaniD++" <djani22@...60...>
Cc: <nbd-general@lists.sourceforge.net>
Sent: Friday, April 14, 2006 5:38 PM
Subject: Re: [Nbd] nbd-server hanging issue


> On Thu, Apr 13, 2006 at 09:52:30AM +0200, JaniD++ wrote:
> > Hello, list
> >
> > I use the 2.8.4 server, and the -persist capable client.
> > Today, one of my nodes hangs, and i cannot kill the server!
>
> Err, that shouldn't happen. Ever.
>
> > [root@...83... root]# killall -KILL nbd-server
> > [root@...83... root]# ps fax | grep nbd
> > 27330 pts/2    S      0:00          \_ grep nbd
> > 17001 ?        D<   230:27 nbd-server 1230 /dev/md0 2097000
> > 26959 ?        D<     0:00 nbd-server 1230 /dev/md0 2097000
> > [root@...83... root]# killall -KILL nbd-server
> > [root@...83... root]# killall -KILL nbd-server
> > [root@...83... root]# killall -KILL nbd-server
> > [root@...83... root]# killall -KILL nbd-server
> > [root@...83... root]# ps fax | grep nbd
> > 27336 pts/2    S      0:00          \_ grep nbd
> > 17001 ?        D<   230:27 nbd-server 1230 /dev/md0 2097000
> > 26959 ?        D<     0:00 nbd-server 1230 /dev/md0 2097000
> > [root@...83... root]#
> >
> > No dmesg message, just hang.
> > (I know this caused by some garbage from the network, but i cannot
> > reproduce...)
>
> Which obviously is going to make debugging rather hard. Still, I'd like
> to try to reproduce this; could you send me a bit more information on
> how this problem occurred that might help me out?
>
> If the system is still running in this broken way, could you run
> "netstat -t" and see whether that returns any high numbers in either the
> "Recv-Q" or "Send-Q" columns?

This happens about 10 times, but one time i catch this:

http://download.netcenter.hu/bughunt/20060422/messages.txt
(715KB)

The full "SysRq : Show Memory" and "SysRq : Show State".

Cheers,
Janos


>
> -- 
> Fun will now commence
>   -- Seven Of Nine, "Ashes to Ashes", stardate 53679.4
>
>
> -------------------------------------------------------
> This SF.Net email is sponsored by xPML, a groundbreaking scripting
language
> that extends applications into web and mobile media. Attend the live
webcast
> and join the prime developer group breaking into this new coding
territory!
> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642
> _______________________________________________
> Nbd-general mailing list
> Nbd-general@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/nbd-general