Assume that you have an Always On Availability Group (AG) with only primary replica (no secondary replicas). Over time, you may encounter the following error:
Error 9002. The transaction log for database is full due to 'AVAILABILITY_REPLICA'.
When you perform a transaction log backup, the error won't be resolved as the log is not truncated and uses all the available space.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
This issue is fixed in the following cumulative update for SQL Server:
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: