Gluster users - Nov 2012 - a lot “failed to get the 'lin kto' xattr Permission denied” log messages！

Hi,all
         when i doing brick rebalance ,  i found a lot  ?failed to get the
'lin kto' xattr Permission denied" message in the mount log
file,how can i
target the problem source ? what does mean this messages?

message sample:

[2012-11-02 11:01:47.113326] W
[client3_1-fops.c:1128:client3_1_fgetxattr_cbk] 4-kvm-vol-3-client-6:
remote operation failed: Permission denied
[2012-11-02 11:01:47.113370] E
[dht-helper.c:652:dht_migration_complete_check_task] 4-kvm-vol-3-dht:
(null): failed to get the 'linkto' xattr Permission denied
[2012-11-02 11:01:47.117607] W
[client3_1-fops.c:1128:client3_1_fgetxattr_cbk] 4-kvm-vol-3-client-7:
remote operation failed: Permission denied
[2012-11-02 11:01:47.117992] W
[client3_1-fops.c:1128:client3_1_fgetxattr_cbk] 4-kvm-vol-3-client-6:
remote operation failed: Permission denied
[2012-11-02 11:01:47.118021] E
[dht-helper.c:652:dht_migration_complete_check_task] 4-kvm-vol-3-dht:
(null): failed to get the 'linkto' xattr Permission denied
[2012-11-02 11:01:47.122888] W
[client3_1-fops.c:1128:client3_1_fgetxattr_cbk] 4-kvm-vol-3-client-7:
remote operation failed: Permission denied
[2012-11-02 11:01:47.123288] W
[client3_1-fops.c:1128:client3_1_fgetxattr_cbk] 4-kvm-vol-3-client-6:
remote operation failed: Permission denied
[2012-11-02 11:01:47.123326] E
[dht-helper.c:652:dht_migration_complete_check_task] 4-kvm-vol-3-dht:
(null): failed to get the 'linkto' xattr Permission denied


and the brick node permission is user id 1001, there no user id exist on
the brick node. but on mount dir ,it's seeing every thing ok.
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