FIX: Assertion occurs when you use parallel redo in a secondary replica of a SQL Server AlwaysOn Availability Group

Applies to: SQL Server 2016 DeveloperSQL Server 2016 EnterpriseSQL Server 2016 Enterprise Core

Symptoms


When you use parallel redo instead of single thread redo in a secondary replica of a SQL Server 2016 AlwaysOn Availability Group, you may receive an assertion.

Resolution


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


Workaround


To work around this issue, use a single thread redo instead of a parallel redo.

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 terminology  that Microsoft uses to describe software updates.