Symptoms
When you have a change tracking enabled database in SQL Server, you may encounter a situation where you may see continuous error 22123 for the same tablename recorded in the error log that resemble the following:
Error: 22123, Severity: 16, State: 1.
Change Tracking autocleanup is blocked on side table of "tablename". If the failure persists, check whether the table "tablename is blocked by any process.
Resolution
A fix for this issue is included in the following updates for SQL Server:
Cumulative Update 10 for SQL Server 2017
Cumulative Update 3 for SQL Server 2016 Service Pack 2
Cumulative Update 1 for SQL Server 2014 Service Pack 3
With this fix, you will not see continuous messages any longer. The frequency of the error 22123 messages, if any, will not be more than once every 30 minutes. To completely eliminate these messages, enable trace flag 8293.
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:
The latest build for SQL Server 2017
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 Microsoft uses to describe software updates.
