[Lustre-discuss] Issue with 1.8.1 patchless client and 1.6.7.2 server

[Andreas Dilger]

On Sep 18, 2009  11:15 -0700, Scott Barber wrote:
> All OSSes and MDSs are 1.6.7.2 (Centos 5.2) 2.6.18-92.1.26.el5_lustre.1.6.7.2smp
> Client is Ubuntu Jaunty running vanilla kernel 2.6.27.34 and patchless
> lustre 1.8.1
> 
> Issue:
> The client mounts the filesystem just fine without errors. When I try
> to copy a file from lustre to a local partition on the client I get a
> whole slew of errors:
> See http://pastie.org/622029.txt

We haven't done any testing with Ubuntu, and past experience tells me
that they have some funky kernel patches that are interacting badly
with the Lustre code.  The only 2.6.27 kernel that we test is from
SLES11.

> The only message I see on the MDS and OSSes are:
> LustreError: 6028:0:(socklnd_cb.c:2228:ksocknal_recv_hello()) Unknown
> protocol version (2.x expected) from 10.2.1.176
> but that's expected since the 1.8.1 client tries to use the new
> protocol, but then drops back down to the old one.

Right.

> I'm not sure if it's related to Bug 19561
> Is there any other data that I can provide to help figure out what's going on?

Yes, it definitely looks like the same problem.  You could
try the SLES11 kernel (also 2.6.27) and see if that fixes
the problem for you.

Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.