Okay, that's a very old tag, and lots of changes have gone in since.  We 
won't be able to easily nail down what changed, but -dev27 isn't 
necessarily expected to work properly.

Daniel

On 02/28/2017 01:06 PM, Supriti Singh wrote:
> This package was created from the tag 2.4-dev-27.
>
>
>
> ------
> Supriti Singh
> SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton,
> HRB 21284 (AG Nürnberg)
>
>>>> Daniel Gryniewicz <d...@redhat.com> 02/28/17 6:44 PM >>>
> Which exact version of 2.4 are they using? If it's 2.4.0.3 or earlier,
> then attribute access was reworked in 2.4.0.4 to fix a lot of races.
>
> Daniel
>
> On 02/28/2017 12:18 PM, Supriti Singh wrote:
>> Hello All,
>>
>> For one of our client, using nfs-ganesha v2.4 and ceph v10.2.4, readdir
>> fails with error:
>>
>> On nfs-client: "/*Remote I/O error*/"
>>
>> In nfs-ganesha server log (Removed some part of readability)
>>
>> */mdcache_readdir :NFS READDIR :F_DBG :About to readdir in
>> mdcache_readdir: directory=0x1f8dc10 cookie=0 collisions 0
>> mdcache_getattrs :INODE :F_DBG :attrs obj attributes Mask = 0005dfce
>> NO_FILE_TYPE
>> Encode FAILED for attr 1, name = FATTR4_TYPE
>> NFS READDIR :F_DBG :Returning NFS4ERR_SERVERFAULT /*
>>
>>
>> But for the same directory=0x1f8dc10 , readdir works sometime.
>> In the log, it prints the correct attr "/*nfs4_FSALattr_To_Fattr :NFS4
>> :F_DBG :Encoded attr 1, name = FATTR4_TYPE*/"
>>
>> Could there be a possible race condition somewhere in accessing mdcache,
>> because of which for the same directory it works sometime?
>>
>> I have not been able to reproduce it. Looking at code, it seems somehow
>> mdcache and attributes are not in sync.
>> Client is also using cephfs cache tiering, but I think that should not
>> have any effect on nfs-ganesha mdcache.
>>
>> Any hints on how to debug it further?
>>
>> Thanks,
>> Supriti
>>
>> ------
>> Supriti Singh
>> SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton,
>> HRB 21284 (AG Nürnberg)
>>
>>
>>
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>
>
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