[OpenAFS] fileserver callback tieup

Rolandas Naujikas rolnas@takas.lt
Fri, 1 Oct 2004 21:20:21 +0300


I'm having problems also on Solaris 9 (Sparc) with OpenAFS 1.2.11
(binaries from openafs.org). I have unresponsible fileserver process
(eating all one of CPU time) and sending UDP packets storm to some IP
address (like server_IP:7000 -> fixed_non_local_IP:some_port) taking all
Internet connection (100Mbps).
After bos restart -all it takes 1800s for nothing, after bosserver kills
(with -9) fileserver and restarts it with salvage).

I dont know, how to debug situation if it rise another time (it's
critical, to work this, because students access files on AFS).


P.S. The same problem was on FreeBSD 4.10 with custom compiled OpenAFS
1.2.11 fileserver, and I moved all volumes to Solaris server.

On Fri, Oct 01, 2004 at 11:46:03AM -0400, Andrew Bacchi wrote:
> I've had two different fileservers rendered unusable recently.  On each
> machine a file has been held open by a client, or the process the client
> is running, causing the callback table to backlog on the fileserver. 
> The fileserver then becomes increasingly unable to answer requests.  A
> 'bos salvage' or  fs shutdown has no effect due to this hung file.  The
> only way to regain activity is to kill -9 the fs process, or reboot the
> machine.
> I'm trying to determine if it's an older client gone awry, or if it is a
> server tuning issue.  Your thoughts are welcome on this, or any other
> possible cause.  Thanks.
> Server platform is RHAS 3 - OpenAFS 1.2.11
> Current tuning flags are: fileserver -L -p 24 -l 1000 -s 1000 -b 200 -cb
> 65535 -vc 1000 -rxpck 2000 -udpsize 1048576
> -- 
> Facade: Provide a unified interface to a set of interfaces in a
> subsystem.
> Andrew Bacchi
> Staff Systems Programmer
> Rensselaer Polytechnic Institute
> phone: 518 276-6415  fax: 518 276-2809
> http://www.rpi.edu/~bacchi/
> --__--__--
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