Re: nfs hang

Ronald Klop <ronald_at_FreeBSD.org> wrote on
Date: Thu, 13 Nov 2025 17:17:48 UTC :

> Op 13-11-2025 om 14:06 schreef Rick Macklem:
> > On Thu, Nov 13, 2025 at 2:45 AM Ronald Klop <ronald@freebsd.org> wrote:
> >>
> >> Op 13-11-2025 om 11:41 schreef Ronald Klop:
> >>> . . .
> >>>
> >>>
> >>
> >>
> >> . . .
> > Do you have more than one client mounting the file system?
> > If you do, make sure they all have different /etc/hostid's.
> > (Cloning a system disk without deleting /etc/hostid can
> > result in multiple clients with the same /etc/hostid. That
> > mean they are "the same client" to the NFSv4 server
> > and that can cause the above.)
> > 
> > If this is not the problem, I don't know why you'd see the
> > above but I suspect the above explains the hang.
> > 
> > rick
> > 
> 
> 
> Two clients. Both have different /etc/hostid.
> 
> I noticed that the procstat stacks start with "null_reclaim". And poudriere null-mounts the nfs mounts in the poudriere-jails.

Do the poudriere jails on each host use the host's /etc/hostid (by content)?

Any worries about needing poudriere jail /etc/hostid content uniqueness?

> Could nfs+nullfs give some trouble? Or maybe it is just nullfs that hangs everything and the nfs stuff is just a result of it.
> 
> At the same moment I had git hanging on a non-NFS mount. See attachment for the procstat which also includes nfs-calls.

===
Mark Millard
marklmi at yahoo.com