NFS lockup when copying a "special" file

[David O'Brien]

On Thu, Jul 13, 2006 at 08:14:34PM +0200, Oliver Lehmann wrote:
> nfs server www:/mnt/space/www: not responding
> nfs server www:/mnt/space/www: not responding
> nfs server www:/mnt/space/www: not responding

I get this all the time now.  I started sometime in 2006.  The only "fix"
I've found is to use NFS over TPC vs. UDP.  For me my NFS server is
i386/bge(4) and the clients are i386/bge, amd64/bge, amd64/nve,
sparc64/hme.

Add "-T" to your mount options in /etc/fstab:
    dragon:/storage /storage nfs -T,rw,intr 0 0

and change "udp" to "tcp" in your /etc/amd.conf
    * opts:=rw,grpid,resvport,vers=3,proto=tcp,nosuid,nodev

-- 
-- David  (obrien at FreeBSD.org)