acfs.log.0

Hi experts
My ct said he is create/delete snapshot by the following command.

# Delete the oldest ACFS Snapshot
/sbin/acfsutil snap delete `ls -t /home/oracle/oggshare/.ACFS/snaps|tail -1` /home/oracle/oggshare
# Create ACFS Snapshot
/sbin/acfsutil snap create oggshare_`date +%Y%m%d_%H` /home/oracle/oggshare


But the below log★ is generated repeatedly  in acfs.log.0.
Is some error occurred？
----------------------------------------------------------------------------------------------------------------------------------------------------------
F1 8527627.759/120229050023 acfssnap_tmp[8802] ofs_snap_lock_special_locks: OfsOpAcquire failed with status(0xc000002a) for lock of type 33.★
F1 8527627.759/120229050023 acfssnap_tmp[8802] OfsSnapStorageThread: exiting with status(0xc000002a)
F1 8527630.008/120229050026 acfssnap_tmp[8809] ofs_snap_lock_special_locks: OfsOpAcquire failed with status(0xc000002a) for lock of type 33. ★