I am replacing an old NFS server that is now running RHEL 3u7 with a new
one on which I installed RHEL5.1. The new one is up to date - kernel is
2.2.18-53.1.14.el5, x86_64. The old server, and others, have run for a
long time without showing the problems described briefly below.

The new system, when accessed by a certain set of NFS clients, generates
scary looking I/O errors in the output stream for commands like ls -l .

The errors only reflect bad handling of NFSACL calls ( V3 GETACL calls).

There may be other issues but one obvious one is that the server is
responding to the NFSACL calls with, to quote wireshark output:-

"
Mesage Type: Reply (1)
[Program: NFSACL (100227)]
[Program Version: 3]
[Procedure: GETACL (1)]
Reply State: Accepted (0)
.
.
Accept State: Remote can't support version # (2)
Program Version (Minimum) : 3
Program Version (Maximum) : 0   "

Note the crazy max and min values at the end - assuming wireshark is
interpreting them correctly.

This may not be the NFSACL problem but the problem is definitely
related to NFSACL calls.

A final bizarre comment is that some other machines running Scientific
Linux 5.1 do not show these problems as NFS servers, and SL 5.1 is
just a dustribution based on RHEL 5.1. Even have the same kernel and
nfs-utils.

Any ideas please ?

Thanks
Alan

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