NFS trouble

Sean McNeil sean at
Mon Oct 11 14:56:40 PDT 2004

On Mon, 2004-10-11 at 14:46, Robert Watson wrote:
> On Mon, 11 Oct 2004, Benjamin Lutz wrote:
> ...
> > Nothing gets logged on the server, the client logs this repeatedly: 
> >   nfs server uno:/var/www/localhost: not responding
> > 
> > Forcibly unmounting the share works and seems to unfreeze the frozen
> > applications. 
> > 
> > This behaviour is new. I cannot say when exactly I've first seen this,
> > but I think it must have appeared somewhere between BETA5 and BETA7. 
> > 
> > What can I do to make NFS work more reliably again? 
> When you're experiencing this problem, can the NFS client ping the NFS
> server?  Are other NFS clients able to continue to access the NFS server
> without problems?  It might be interesting to use tcpdump to see if the
> client stops sending RPCs or not, and if not, whether the server responds
> to them.   If you set debug.mpsafenet=0 in loader.conf, does the problem
> go away?  Also, finally, what ethernet device(s) are you using, and are
> there any notes about those devices in the dmesg output?

Also, you didn't supply hardware info.  Specifically, what is your nic
on the FreeBSD box?  There is a known problem with txcsum and re0 that
requires you to do an

ifconfig re0 -txcsum

or you will experience symptoms like you are describing.


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