[ceph-users] Timeout ceph rbd-nbd mounted image

Hello , Looking for information about a timeout which occur once a week for a ceph rbd image mounted on a machine using rbd-nbd (Linux Ubuntu machine). The error found in 'dmseg' is below : [798016.401469] block nbd0: Connection timed out [798016.401506] block nbd0: shutting down sockets Many Thanks