In Microsoft SQL Server 2016, you may encounter a“Non-yielding Scheduler” condition if a large number of row-column valuesare processed in row groups. The threshold was decreased to yieldthe processor.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
This issue is fixed in the following cumulative update for SQL Server:
About cumulative updates for SQL Server:
Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server: