[CentOS] NFS issues

Wed Aug 13 02:52:15 UTC 2008
Craig White <craigwhite at azapple.com>

On Tue, 2008-08-12 at 14:27 +0200, Johan Swensson wrote:
> So I'm running nfs to get content to my web servers. Now I've had this
> problem 2 times (about 2 weeks since the last occurrence).
> I use drbd on the nfs server for redundancy. Now to my problem:
> All my web sites stopped responding so I started by checking dmesg and
> there I found a bunch of this errors
> Aug 11 16:00:39 web03 kernel: lockd: server not responding, timed out
> Aug 11 16:02:39 web03 kernel: lockd: server not responding, timed out
> But when checking the nfs server lockd was running and I could access
> all the files from the webserver with ls, cd etc.
> The logs on the nfs server doesn't say anything of interest and
> checking apaches error_log just says "not found or unable to stat".
> Now I mentioned this have happened 2 times and both these times I've
> "solved" it by rebooting the nfs server and web servers. This isn't a
> good solution to have to reboot my servers every couple of weeks so I
> really could use some help. :)
> Also I get this from time to time on the web servers, dunno if it's
> related.
> do_vfs_lock: VFS is out of sync with lock manager!
I too have been having the same issues with my nfs server - which seems
to have started when I updated on July 27th (5.2)

It seems to happen after logrotate on Sunday morning but I didn't know
about it until users show up on Monday mornings.

/var/log/messages has...

Aug  4 09:32:59 cube kernel: lockd: server HOSTNAME not responding,
still trying

and like you, I've rebooted the main server each time (Monday
mornings)...there's something wrong that I can't figure out