On 03/20/2013 07:55 AM, Akemi Yagi wrote:
> On Wed, Mar 20, 2013 at 1:22 AM, Antonietta Donzella
> <[log in to unmask]> wrote:
>> 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
> Looks like you are affected by a known bug. It is probably the same as this one:
>
> http://bugs.centos.org/view.php?id=6241
>
> If so, there is no fix at the moment unfortunately.
>
> Akemi

I've heard an rumor that disabling dir_index on the 'EXT' family of 
filesystems will work around the behavior.

This information is presented without recommendation.

Pat

-- 
Pat Riehecky

Scientific Linux developer
http://www.scientificlinux.org/