Symptoms
Assume that you use Microsoft SQL Server 2012 Service Pack 2 (SP2) or SQL Server 2014 AlwaysOn Availability Groups feature. When an availability group is moved from one server instance to another server instance because of a failover occurrence, you receive the following error message in SQL Server ERRORLOG on the server whose database is switching from the primary replica to a secondary replica:
System objects could not be updated in database '<database name>' because it is read-only
Resolution
This issue was first fixed in the following cumulative update of SQL Server.
Cumulative Update 5 for SQL Server 2014 /en-us/help/3011055
Cumulative Update 3 for SQL Server 2012 SP2 /en-us/help/3002049
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:
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
