We are running RedHat 5.2 with nfs-server-2.2beta37.  We
have installed a new kernel (2.1.131-ac9 patched to run md).
When mounting file systems from this server using NFS over
TCP, and then writing to the server, it usually causes the
server to crash.  Sometimes, however, it just disallows the
write (permission denied) or reports that the file you are
trying to write to is a directory.

I have emailed Olaf Kirch who suggested the problem is
probably in glibc:

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I have no idea where the UDP problem may come from. The TCP
problem however is most likely caused by the glibc-2.0.7 RPC
code. If you want to recompile glibc, look at
sunrpc/svc_tcp.c and diff it against an earlier
version of glibc.  You'll notice that a call to
svc_getreqset or some such was added to the readtcp()
function; replace all of readtcp() with the older version
and you should be fine.

Or ask RedHat whether they have made a fixed version.

Olaf
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We have a patch and are currently building an RPM to solve
our immediate problems.

				Keith Underwood
				Clemson University