[plug] NFSv4 issues

[Dean Bergin]

If you've been able to replicate the issue with bare metal clients, the the
issue likely rests at the server side. The spurious TCP events in the logs
might suggest you have a network problem.

My first guess is that you may have fragmentation causing packet loss and
latency affecting NFS (not sure if that's a correct diagnosis as NFS is TCP
which should be able to handle a far amount of retransmissions, but I could
be wrong).

Also, in my line of work I often see issues with MTU causing all kinds of
problems. Check that too and let us know.

A packet capture might help get the evidence to suggest what's going on by
following the conversation from a network perspective at least.

HTH

On Tue, 22 Feb 2022, 11:25 Brad Campbell, <brad at fnarfbargle.com> wrote:

> On 22/2/22 09:54, Benjamin wrote:
> > As the adage goes, "It's not DNS, there's no way it's DNS..."
> >
> > Easy enough to test, swap out the hostname for the direct IP and see if
> > you still have the issue :)
> >
>
> Swapped the hostname for direct IP and the issue persists. :(
>
> Would have been great if it were that easy.
>
> Regards,
> Brad
> --
> An expert is a person who has found out by his own painful
> experience all the mistakes that one can make in a very
> narrow field. - Niels Bohr
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