FIX: Primary replica databases display "NOT SYNCHRONIZING" status when all replicas in AG use synchronous commit availability mode in SQL Server 2017

Applies to: SQL Server 2017 DeveloperSQL Server 2017 EnterpriseSQL Server 2017 Enterprise Core


Assume that you have an Always On Availability Group (AG) that contains many databases in an instance of Microsoft SQL Server 2017. After you restart the hosted system or the SQL Server Service, some databases on the secondary replica display the "SYNCHRONIZING" status when you view sys.dm_hadr_database_replica_states output from the secondary replica. However, the same databases on the secondary replica display "NOT SYNCHRONIZING" when you view the Dynamic Management Views (DMV) output from the primary replica.

Note If you stop and then restart the mirroring endpoint on the secondary replica, the databases' status change to "SYNCHRONIZING" on the secondary replica.


The fix for this issue is included in the following update for SQL Server:

Cumulative Update 13 for SQL Server 2017


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


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