Description of problem:
=======================
On a distributed volume, If <source> file does not exist(<source> file has been renamed to <dest> from another mount point) then rename from <src> <dest> fails with 'are the same file' error. It should failed with 'No such file or Directory' error.


Version-Release number :
=========================
3.6.0.24-1.el6rhs.x86_64


How reproducible:
=================
Intermittent 


Steps to Reproduce:
====================
1. create and mount distributed volume. (mount on multiple client)
2. create few files from mount point.
[root@OVM1 ren]# touch a{1..10}

3. now from one mount point rename files and from another mount point rename same file .
[root@OVM3 ren]# for i in {1..10} ; do mv a$i b$i ; done

[root@OVM1 ren]# for i in {1..10} ; do mv a$i b$i ; done
mv: overwrite `b6'? n
mv: `a7' and `b7' are the same file
mv: `a8' and `b8' are the same file
mv: `a9' and `b9' are the same file
mv: `a10' and `b10' are the same file

[root@OVM1 ren]# ls
b1  b10  b2  b3  b4  b5  b6  b7  b8  b9

-->  for few files it's failing with error 'mv: `a7' and `b7' are the same file'



Actual results:
===============
Rename is failing with are the same file



Expected results:
===============
It should fail with 'No Such file or Directory' error

Additional Info:-
=================
log:-
[2014-07-07 16:40:26.109472] W [dht-linkfile.c:49:dht_linkfile_lookup_cbk] 0-ren-dht: got non-linkfile ren-client-2:/b5, gfid = 00000000-0000-0000-0000-000000000000
[2014-07-07 16:40:26.113137] D [fuse-resolve.c:83:fuse_resolve_entry_cbk] 0-fuse: 00000000-0000-0000-0000-000000000001/b6: failed to resolve (No such file or directory)
[2014-07-07 16:40:26.117122] D [fuse-resolve.c:83:fuse_resolve_entry_cbk] 0-fuse: 00000000-0000-0000-0000-000000000001/b6: failed to resolve (No such file or directory)
[2014-07-07 16:40:26.118762] D [MSGID: 0] [dht-common.c:1087:dht_lookup_everywhere_cbk] 0-ren-dht: found on ren-client-0 file /b6
[2014-07-07 16:40:26.118850] D [MSGID: 0] [dht-common.c:972:dht_lookup_everywhere_done] 0-ren-dht: Linking file /b6 on ren-client-0 to ren-client-2 (hash)(gfid = 00000000-0000-0000-0000-000000000000)
[2014-07-07 16:40:26.119481] W [client-rpc-fops.c:240:client3_3_mknod_cbk] 0-ren-client-2: remote operation failed: File exists. Path: /b6
[2014-07-07 16:40:37.540637] D [fuse-bridge.c:49:fuse_invalidate] 0-fuse: Invalidate inode id 140282468394284.
[2014-07-07 16:40:37.545079] D [fuse-bridge.c:49:fuse_invalidate] 0-fuse: Invalidate inode id 140282468393972.
[2014-07-07 16:40:37.549575] D [fuse-bridge.c:49:fuse_invalidate] 0-fuse: Invalidate inode id 140282468394440.
[2014-07-07 16:40:37.553626] D [fuse-bridge.c:49:fuse_invalidate] 0-fuse: Invalidate inode id 140282468394752.