Description of problem:
gluster volume clear-locks <Volume_name> <path_to_file> kind all posix always fails with "clear-locks getxattr command failed. Reason: Invalid argument" 

Version-Release number of selected component (if applicable):
mainline

How reproducible:
often

Actual results:
[root@APP-SERVER1 glusterfs]# gluster volume clear-locks dist / kind all posix
Volume clear-locks unsuccessful
clear-locks getxattr command failed. Reason: Invalid argument

[root@APP-SERVER1 glusterfs]# gluster volume clear-locks dist /file1 kind all posix
Volume clear-locks unsuccessful
clear-locks getxattr command failed. Reason: Invalid argument

Glusterd log:-
--------------

[2012-02-24 16:50:02.602921] I [glusterd-volume-ops.c:1783:glusterd_op_clearlocks_volume] 0-management: Received clear-locks request for volume dist with kind all type posix and options (null)
[2012-02-24 16:50:02.646580] E [glusterd-volume-ops.c:1834:glusterd_op_clearlocks_volume] 0-management: clear-locks getxattr command failed. Reason: Invalid argument
[2012-02-24 16:50:02.657537] E [glusterd-op-sm.c:1808:glusterd_op_ac_send_commit_op] 0-: Commit failed