KB4540342 - FIX: Non-yielding scheduler condition occurs with CONNECTION_MANAGER spinlock in SQL Server

Applies to: SQL Server 2016 Service Pack 2SQL Server 2016 DeveloperSQL Server 2016 Enterprise


Consider thefollowing scenario:
  • You have an active session with the sni_trace XEvent.
  • You use the sys.dm_exec_connections DMV.
  • SQL Server has many concurrent login/logout activities. 
In thisscenario, you may encounter a non-yielding scheduler condition with theCONNECTION_MANAGER spinlock, and a memory dump occurs.


The workaround for this issue is to avoid running anXEvent session with the sni_trace XE in a production environment. It’s notrecommended to have a long-running  XEvent session with the sni_trace XEbecause it can affect performance.


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 updates 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:


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