Recently I faced a issue related to Full farm backup .When I use to take a Full farm backup we use to get error
"object (database name) failed in event OnBackup. for more information, see the error log located in the backup directory. sqlException: BACKUP DATABASE is terminating abnormally.
Digging more in to the issue we came accross many settings. but the one thats solved the problem was a registry entry
We added the registry key “SessTimeout” at the location HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters.
We gave the value as 360 for SessTimeout
Here is the article you can check