I have UrBackup server running on Asustor NAS via docker.
Last time I was backing up a cliente the dashboard become inaccessible and I found the below entries in the log file /volume1/Docker/urBackup/log/urbackup.log
2022-04-06 07:20:19: rds: Calculating tree difference size...
2022-04-06 07:20:19: rds: Linking unchanged and loading new files...
2022-04-06 07:20:19: Waiting for file transfers...
2022-04-06 07:20:32: Waiting for file hashing and copying threads...
2022-04-06 07:20:48: Waiting for metadata download stream to finish
2022-04-06 07:22:32: Writing new file list...
2022-04-06 07:22:34: All metadata was present
2022-04-06 07:23:08: Transferred 139.171 MB - Average speed: 19.8326 MBit/s
2022-04-06 07:23:17: Time taken for backing up client rds: 4m 50s
2022-04-06 07:23:17: Backup succeeded
2022-04-06 07:23:17: Updating statistics...
2022-04-06 07:23:17: Updating image stats...
2022-04-06 07:23:17: Updating file statistics...
2022-04-06 07:23:17: Done updating statistics.
2022-04-06 07:23:18: server_prepare_hash Thread finished (exit)
2022-04-06 07:23:18: server_hash Thread finished - normal
2022-04-06 07:23:47: Starting scheduled incremental file backup...
2022-04-06 07:24:27: WARNING: Error sending mail to "***@***.***". SSL connect error(ec=35), error:1425F102:SSL routines:ssl_choose_client_version:unsupported protocol. Retrying in 2s
2022-04-06 07:24:29: Create a readonly snapshot of '/srv/dev-disk-by-id-md-name-hansstaden-backup' in '/srv/dev-disk-by-id-md-name-hansstaden-backup/.urbackup_snaps/6afd41d988ff84f3e4dd275896277ae01be5403c1ee9a76b'
2022-04-06 07:24:29: Indexing of "automysqlbackup" done. 418 filesystem lookups 0 db lookups and 0 db updates
2022-04-06 07:24:29: Indexing of "ftp" done. 15 filesystem lookups 0 db lookups and 0 db updates
2022-04-06 07:24:29: Indexing of "web-postlog" done. 21 filesystem lookups 0 db lookups and 0 db updates
2022-04-06 07:24:29: hansstaden: Loading file list...
2022-04-06 07:24:30: hansstaden: Calculating file tree differences...
2022-04-06 07:24:31: hansstaden: Creating snapshot...
2022-04-06 07:25:08: hansstaden: Deleting files in snapshot... (88)
2022-04-06 07:25:09: hansstaden: Deleting files in hash snapshot...(88)
2022-04-06 07:25:09: hansstaden: Calculating tree difference size...
2022-04-06 07:25:09: hansstaden: Linking unchanged and loading new files...
2022-04-06 07:25:10: Waiting for file transfers...
2022-04-06 07:28:27: Waiting for file hashing and copying threads...
2022-04-06 07:29:27: Writing new file list...
2022-04-06 07:29:28: WARNING: Error sending mail to "***@***.***". SSL connect error(ec=35), error:1425F102:SSL routines:ssl_choose_client_version:unsupported protocol. Retrying in 30m
2022-04-06 07:29:28: WARNING: Error sending mail to "***@***.***". SSL connect error(ec=35), error:1425F102:SSL routines:ssl_choose_client_version:unsupported protocol. Retrying in 30m
2022-04-06 07:29:28: WARNING: Error sending mail to "***@***.***". SSL connect error(ec=35), error:1425F102:SSL routines:ssl_choose_client_version:unsupported protocol. Retrying in 4s
2022-04-06 07:29:28: All metadata was present
2022-04-06 07:29:41: Transferred 1.7225 GB - Average speed: 62.2686 MBit/s
2022-04-06 07:29:47: Time taken for backing up client hansstaden: 6m
2022-04-06 07:29:47: Backup succeeded
2022-04-06 07:29:47: Updating statistics...
2022-04-06 07:29:47: Updating image stats...
2022-04-06 07:29:47: Updating file statistics...
2022-04-06 07:29:47: Done updating statistics.
2022-04-06 07:29:48: server_prepare_hash Thread finished (exit)
2022-04-06 07:29:48: server_hash Thread finished - normal
2022-04-06 07:34:28: WARNING: Error sending mail to "***@***.***". SSL connect error(ec=35), error:1425F102:SSL routines:ssl_choose_client_version:unsupported protocol. Retrying in 8s
2022-04-06 07:35:49: New Backupclient: SMS-DXUCPLN7278
2022-04-06 07:35:50: Starting scheduled incremental image backup of volume "C:"...
2022-04-06 07:35:50: Starting scheduled full image backup of volume "SYSVOL"...
2022-04-06 07:38:21: Transferred 493.628 MB - Average speed: 27.5284 MBit/s
2022-04-06 07:38:21: Updating statistics...
2022-04-06 07:38:21: Updating image stats...
2022-04-06 07:38:21: Updating file statistics...
2022-04-06 07:38:21: Done updating statistics.
2022-04-06 07:38:21: Starting scheduled full image backup of volume "ESP"...
2022-04-06 07:39:28: WARNING: Error sending mail to "***@***.***". SSL connect error(ec=35), error:1425F102:SSL routines:ssl_choose_client_version:unsupported protocol. Retrying in 16s
2022-04-06 07:39:55: Transferred 260.54 MB - Average speed: 23.4081 MBit/s
2022-04-06 07:39:55: Updating statistics...
2022-04-06 07:39:55: Updating image stats...
2022-04-06 07:39:55: Updating file statistics...
2022-04-06 07:39:55: Done updating statistics.
2022-04-06 07:39:55: Basing image backup on last full image backup
2022-04-06 07:43:28: Looking for old Sessions... 0 sessions
2022-04-06 07:44:28: WARNING: Error sending mail to "***@***.***". SSL connect error(ec=35), error:1425F102:SSL routines:ssl_choose_client_version:unsupported protocol. Retrying in 30m
2022-04-06 07:44:28: WARNING: Error sending mail to "***@***.***". SSL connect error(ec=35), error:1425F102:SSL routines:ssl_choose_client_version:unsupported protocol. Retrying in 30m
2022-04-06 07:44:28: WARNING: Error sending mail to "***@***.***". SSL connect error(ec=35), error:1425F102:SSL routines:ssl_choose_client_version:unsupported protocol. Retrying in 32s
2022-04-06 07:49:28: WARNING: Error sending mail to "***@***.***". SSL connect error(ec=35), error:1425F102:SSL routines:ssl_choose_client_version:unsupported protocol. Retrying in 1m 4s
2022-04-06 07:54:28: WARNING: Error sending mail to "***@***.***". SSL connect error(ec=35), error:1425F102:SSL routines:ssl_choose_client_version:unsupported protocol. Retrying in 2m 8s
2022-04-06 07:59:28: WARNING: Error sending mail to "***@***.***". SSL connect error(ec=35), error:1425F102:SSL routines:ssl_choose_client_version:unsupported protocol. Retrying in 30m
2022-04-06 07:59:28: WARNING: Error sending mail to "***@***.***". SSL connect error(ec=35), error:1425F102:SSL routines:ssl_choose_client_version:unsupported protocol. Retrying in 30m
2022-04-06 07:59:28: WARNING: Error sending mail to "***@***.***". SSL connect error(ec=35), error:1425F102:SSL routines:ssl_choose_client_version:unsupported protocol. Retrying in 4m 16s
2022-04-06 08:04:28: WARNING: Error sending mail to "***@***.***". SSL connect error(ec=35), error:1425F102:SSL routines:ssl_choose_client_version:unsupported protocol. Retrying in 8m 32s
2022-04-06 08:13:29: Looking for old Sessions... 1 sessions
2022-04-06 08:14:28: WARNING: Error sending mail to "***@***.***". SSL connect error(ec=35), error:1425F102:SSL routines:ssl_choose_client_version:unsupported protocol. Retrying in 30m
2022-04-06 08:14:28: WARNING: Error sending mail to "***@***.***". SSL connect error(ec=35), error:1425F102:SSL routines:ssl_choose_client_version:unsupported protocol. Retrying in 30m
2022-04-06 08:14:28: WARNING: Error sending mail to "***@***.***". SSL connect error(ec=35), error:1425F102:SSL routines:ssl_choose_client_version:unsupported protocol. Retrying in 17m 4s
2022-04-06 08:15:37: WARNING: Shutting down (Signal 15)
2022-04-06 08:15:37: Exited Loop
2022-04-06 08:15:37: Deleting at..
2022-04-06 08:15:37: Deleting SelectThreads..
2022-04-06 08:15:37: waiting for selectthread...
2022-04-06 08:15:37: deleting workers
2022-04-06 08:15:37: worker: 0
2022-04-06 08:15:37: waiting for worker...
2022-04-06 08:15:37: done.
2022-04-06 08:15:37: worker: 1
2022-04-06 08:15:37: waiting for worker...
2022-04-06 08:15:37: done.
2022-04-06 08:15:37: worker: 2
2022-04-06 08:15:37: waiting for worker...
2022-04-06 08:15:37: done.
2022-04-06 08:15:37: worker: 3
2022-04-06 08:15:37: waiting for worker...
2022-04-06 08:15:37: done.
2022-04-06 08:15:37: worker: 4
2022-04-06 08:15:37: waiting for worker...
2022-04-06 08:15:37: done.
2022-04-06 08:15:37: Deleting lbs...
2022-04-06 08:15:37: Shutting down plugins...
2022-04-06 08:15:37: Deleting server...
Did it shutdown because it couldn’t send the emails? Is this a normal behavior?
I also found the below log entry in /var/log/message
2022-04-06T08:15:37.380643-03:00 AS6508T-0F6F kernel: [44442.445418] traps: ibackup main[26081] general protection fault ip:55fadcf76744 sp:7f50427e9780 error:0 in urbackupsrv[55fadcc1b000+4b2000]
2022-04-06T08:15:39.073722-03:00 AS6508T-0F6F kernel: [44444.161869] docker0: port 1(veth8f097bd) entered disabled state
2022-04-06T08:15:39.074523-03:00 AS6508T-0F6F kernel: [44444.162119] veth87922f2: renamed from eth0
2022-04-06T08:15:39.896498-03:00 AS6508T-0F6F kernel: [44444.984109] docker0: port 1(veth8f097bd) entered disabled state
2022-04-06T08:15:39.899501-03:00 AS6508T-0F6F kernel: [44444.986751] device veth8f097bd left promiscuous mode
2022-04-06T08:15:39.899521-03:00 AS6508T-0F6F kernel: [44444.986755] docker0: port 1(veth8f097bd) entered disabled state