FIX: "Non-yielding Scheduler" condition when you run a query that contains a UNION operation in SQL Server 2014 or 2016

Gilt für: SQL Server 2014 DeveloperSQL Server 2014 DeveloperSQL Server 2014 Enterprise

Symptoms


When you compile or run a query that contains a UNION operation in SQL Server 2014 or 2016, and the rowsets in the union contain lots of columns, a "Non-yielding Scheduler" condition may occur. Then, SQL Server generates a memory dump file.

Resolution


Cumulative update information

The issue was first fixed in the following cumulative update of SQL Server 2014:


Status


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