[OpenAFS] Messages found in /usr/afs/logs/FileLog

Jeffrey Hutzelman jhutz@cmu.edu
Fri, 28 May 2004 10:45:30 -0400


On Friday, May 28, 2004 13:30:12 +0100 "Wheeler, JF (Jonathan) " 
<J.F.Wheeler@rl.ac.uk> wrote:

> Looking at the file /usr/afs/logs/FileLog (for a Transarc AFS 3.6
> server), I see that there are more than 4000 messages like these:
>
> Fri May 28 11:26:46 2004 CB: RCallBackConnectBack (host.c) failed for host
> 9bc6d857.7001
> Fri May 28 11:27:42 2004 CB: RCallBackConnectBack (host.c) failed for host
> 9bc6d82b.7001
>
> The current FileLog begun on 18th May (10 days ago).  Please would someone
> explain what the messages mean.  Note that the last string on each message
> varies (193 different forms so far).  Virtually all the messages end with
> 7001, but one each end with 15865, 33079, 33187 and 33298; I assume that
> these are port numbers.

Yes, they are indeed port numbers.  And the 8 hex digits are an IP address.
Whenever a new client talks to a fileserver, the server makes several RPC's 
back to the client to determine its identity, find out what set of features 
it supports, and to make sure the client doesn't think it has outstanding 
callbacks from this fileserver.  The message you quote indicates that one 
of these operations failed, and the new client has been marked "DOWN" so it 
will be probed again later.  The numbers at the end identify the IP address 
and port of the client in question.

In general, you don't need to worry too much about these.  The reason is 
almost always that traffic to the client in question is being dropped 
somewhere along the way, possibly because the client (or fileserver!) is 
behind a misconfigured firewall or NAT box.  If this is the case, the 
client will generally notice there is a problem.

In any case, this message does not indicate that there is something wrong 
with your server.

-- Jeffrey T. Hutzelman (N3NHS) <jhutz+@cmu.edu>
   Sr. Research Systems Programmer
   School of Computer Science - Research Computing Facility
   Carnegie Mellon University - Pittsburgh, PA