Symptoms
Assume that you use Always On Availability Groups (AG) in Microsoft SQL Server. When you rename the host name of the server that hosts the instance of SQL Server and restart the instance, all databases in the AG remain in RECOVERY_PENDING state, and access violations occur.
Resolution
This fix is included in the following update for SQL Server:
About SQL Server builds
Each new build for SQL Server contains all the hotfixes and security fixes that were in the previous build. We recommend that you install the latest build for your version of SQL Server:
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
Learn about the standard terminology that Microsoft uses to describe software updates.