FYI...
Adding hep.anl.gov to Local-Realms in idmapd.conf on both client and server, followed by restarting rpcidmapd and remounting the volume on the client solved the problem...'almost':

I still get a server-side error message complaining that my uid doesn't map into localdomain: nss_getpwnam: name 'myuid' does not map into domain 'localdomain' But I can now change permissions on the client, so I am declaring victory.

Thanks
Eve



On Wed, 1 Jul 2015, Orion Poplawski wrote:

Date: Wed, 1 Jul 2015 12:02:05 -0500
From: Orion Poplawski <[email protected]>
To: Eve V. E. Kovacs <[email protected]>, [email protected]
Subject: Re: nfsv4 and rpcidmapd

On 06/30/2015 01:46 PM, Eve V. E. Kovacs wrote:
We have an SL6 nfsv4 file server and a number of SL6 clients.
We were careful to configure idmapd.conf on both the clients and the server to
have the same domain name as follows:

# The following should be set to the local NFSv4 domain name
# The default is the host's DNS domain name.
#Domain = local.domain.edu
Domain = localdomain

All of this worked until recently.

Now, when I try to change the ownership of my file 'test' on one of the
clients, I get an error:
chown: changing ownership of test : Invalid argument

On the server, I see errors in the log file:
 rpc.idmapd[6092]: nss_getpwnam: name '[email protected]' does not map into
domain 'localdomain'

Another thing that could be tried, add hep.anl.gov to Local-Realms in 
idmapd.conf.


--
Orion Poplawski
Technical Manager                     303-415-9701 x222
NWRA, Boulder/CoRA Office             FAX: 303-415-9702
3380 Mitchell Lane                       [email protected]
Boulder, CO 80301                   http://www.nwra.com


***************************************************************
Eve Kovacs
Argonne National Laboratory,
Room L-177, Bldg. 360, HEP
9700 S. Cass Ave.
Argonne, IL 60439 USA
Phone: (630)-252-6208
Fax:   (630)-252-5047
email: [email protected]
***************************************************************

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