If you use Always On availability group (AG) and the transaction rate isvery low (for example, less than 1 transaction per 10 seconds), you may seethe following message in the SQL Server error log:
DateTime SpidId Always On Availability Groups transport has detected a missing log block for availability database "DatabaseName". LSN of last applied log block is (BlockId). Log scan will be restarted to fix the issue. This is an informational message only. No user action is required.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
- Cumulative Update 4 for SQL Server 2019
- Cumulative Update 20 for SQL Server 2017
- Cumulative Update 12 for SQL Server 2016 SP2
About cumulative updates for SQL Server:
Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server: