Hi,
I share directories on a Scientific linux cluster by using nfs 
tool.
SLC6 kernel 2.6.32-279.22.1.el6.x86_64
nfs-utils-1.2.3-26.el6.x86_64

After a server-client shutdown, a disagreeable event occurred.
By making ls list on a nfs client shared directory, duplicated entries for 
some files are shown.
Other files and sub-directories are non visible. The problem is not 
present on the nfs server.
The directory don't contain an enormous number of files:

On the server:
#ls |wc -l
330
#du -s
8855740

On the client:
#ls |wc -l
ls: reading directory .: Too many levels of symbolic links
120
n.b. there are only two symbolic links and they are not changed after the 
shutdown; however, the problem is not cleared if I remove them. 
#du -s
not responding
#dmesg
some entries:
...
NFS: directory images/dp contains a readdir loop.Please contact your 
server vendor. The file: .. has duplicate cookie 683570819
NFS: directory images/dp contains a readdir loop.Please contact your 
server vendor. The file: .. has duplicate cookie 683570819
__ratelimit: 2 callbacks suppressed
NFS: directory images/green contains a readdir loop.Please contact your 
server vendor. The file: 57.png has duplicate cookie 1694199390
NFS: directory images/green contains a readdir loop.Please contact your 
server vendor. The file: 57.png has duplicate cookie 1694199390
...

I've tried to boot the system with the older kernel-2.6.32-279.el6.x86_64,
and with the new kernel 2.6.32-358.2.1.el6.x86_64 but the bug is not
cleared. Any ideas?

Many thanks in advance
Antonietta