NFS consistency problem?

[Jonathan Schmitt]

Dear all,

I'm using nfs4 with gss/kerberos authentification and I'm having a consistency 
(cache coherency?) problem.

One user A modifies a file on one computer, a second user B views this file 
but is left with a non-updated version of this file. 

A umount/mount of the directory solves the issue. Also, if user B now decides 
to modify the (non-updated) file and saves the modification, user As changes 
get overridden and from then on A as well as B see the modifications of B.

Both, clients as well as server are setup with Debian Sarge, the underlying 
file system on the server is ext3, the nfs server is the kernel-server (v 
1.0.10). Server as well as clients use nfs-utils v1.0.10.

exports are done with option
  async rw fsid=0 insecure no_subtree_check anonuid=65534 anongid=65534

mount is done with options
  auto rw sec=krb4

I've tried to find info on this, but maybe I'm just to unfamiliar with the 
vocabulary so that I don't get any useful results. If this is a known 
problem, could someone point me to the correct search phrase, please?

Any ideas?

Kind regards,
Jonathan
-- 
If Machiavelli were a hacker, he'd have worked for the CSSG.
		-- Phil Lapsley