on my 4.1 environment sometimes I get this kind of message, typically when I create a snapshot.

Please note that the snapshot is correctly created: I get the event between the snapshot creation initiated and completed events 

VDSM ovmsrv05 command TeardownImageVDS failed: Cannot deactivate Logical Volume: ('General Storage Exception: ("5 [] [\'  WARNING: Not using lvmetad because config setting use_lvmetad=0.\', \'  WARNING: To avoid corruption, rescan devices to make changes visible (pvscan --cache).\', \'  Logical volume 922b5269-ab56-4c4d-838f-49d33427e2ab/79350ec5-eea5-458b-a3ee-ba394d2cda27 in use.\', \'  Logical volume 922b5269-ab56-4c4d-838f-49d33427e2ab/3590f38b-1e3b-4170-a901-801ee5d21d59 in use.\']\\n922b5269-ab56-4c4d-838f-49d33427e2ab/[\'3590f38b-1e3b-4170-a901-801ee5d21d59\', \'79350ec5-eea5-458b-a3ee-ba394d2cda27\']",)',)

What is the exact meaning and how can I crosscheck to solve the possible anomaly...?

What about lvmetad reference inside the message? Is it an option that in oVirt can be configured or not at all for now?

Thanks,

Gianluca