Symptoms
Assume that you have an Always On Availability Group (AG) that has only a primary replica (no secondary replicas). Over time, you may encounter the following error message:
Error 9002. The transaction log for database is full due to 'AVAILABILITY_REPLICA'.
When you run a transaction log backup, the error won't be resolved because the log is not truncated, and it uses all the available space.
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Resolution
This problem is fixed in the following cumulative updates 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:
Service Pack Information for SQL Server 2016
This problem is fixed in the following service pack for SQL Server:
Service packs are cumulative. Each new service pack contains all the fixes that are in previous service packs, together with any new fixes. We recommend that you apply the latest service pack and the latest cumulative update for that service pack. You do not have to install a previous service pack before you install the latest service pack. Use Table 1 in the following article to find more information about the latest service pack and latest cumulative update.
Determine the version, edition, and update level of SQL Server and its components
References
Learn about the terminology that Microsoft uses to describe software updates.
