Error Code: Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.
Example:
[08:01:47.379] [HostName] Connecting to SQL server HostName...
[08:01:47.383] [HostName] Transaction log backup for database [BSM] will truncate logs... [08:01:47.383] [HostName] Starting to backup transaction log for database [BSM]... [08:04:15.879] [HostName] Database [HostName:BSM] Percent: 5% completed [08:06:48.387] [HostName] Database [HostName:BSM] Percent: 10% completed [08:08:43.885] [HostName] Database [HostName:BSM] Percent: 15% completed [08:10:43.644] [HostName] Database [HostName:BSM] Percent: 20% completed [08:11:47.474] [HostName] [SQL SMO Error]: Backup failed for Server 'HostName'. An exception occurred while executing a Transact-SQL statement or batch. Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding. [08:11:47.483] [HostName] [SQL SMO Error]: Backup failed for Server 'HostName'. An exception occurred while executing a Transact-SQL statement or batch. Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding. [08:11:47.483] [HostName] [SQL SMO Error]: Backup failed for Server 'HostName'. An exception occurred while executing a Transact-SQL statement or batch. Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.