FIX: "Non-yielding Scheduler" error and SQL Server appears unresponsive in SQL Server 2014, 2016 and 2017

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


Assume that you have Microsoft SQL Server 2014, 2016 or 2017 installed. In some cases, the SQL Server instance appears unresponsive and a "Non-yielding Scheduler" error occurs. You may have to restart the server to recover.


This problem is fixed in the following cumulative updates for SQL Server:

       Cumulative Update 9 for SQL Server 2017

       Cumulative Update 2 for SQL Server 2016 SP2

Service pack information for SQL Server

This update is fixed in the following service pack for SQL Server:

Service Pack 3 for SQL Server 2014


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


Learn about the terminology that Microsoft uses to describe software updates.