KB4539947 - FIX: Assertion occurs when you run DATABASE SCOPED command in SQL Server 2016

Symptoms

Assume that you use Microsoft SQL Server 2016. When you run ALTER command to change database scoped configuration and also use function fn_dblog to retrieve the modified rows of the database, then you may receive an Assertion error. Here is one of the command to change database scoped configuration parameter.

ALTER DATABASE SCOPED CONFIGURATION SET PARAMETER_SNIFFING = Off;

Additionally, messages that resemble the following are logged in the SQL Server error log.


<DateTime> spid<n>      Using 'dbghelp.dll' version '4.0.5'

<DateTime> spid<n>      **Dump thread - spid = 0, EC = 0x0000028909775730

<DateTime> spid<n>      ***Stack Dump being sent to <FilePath\FileName>\SQLDump<nnnnn>.txt

<DateTime> spid<n>      * *******************************************************************************

<DateTime> spid<n>      *

<DateTime> spid<n>      * BEGIN STACK DUMP:

<DateTime> spid<n>      *   <DateTime> spid <SPID>

<DateTime> spid<n>      *

<DateTime> spid<n>      * Location: medutil.cpp:LineNumber

<DateTime> spid<n>      * Expression:            FALSE

<DateTime> spid<n>      * spid:                  <SPID>

<DateTime> spid<n>      * Process ID:            <PID>

<DateTime> spid<n>      * Description:           Invalid switch value

Status

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

Resolution

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:

References

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

Need more help?

Expand your skills
Explore Training
Get new features first
Join Microsoft Insiders

Was this information helpful?

Thank you for your feedback!

×