FIX: Error message when you try to break database mirroring between two servers that are running SQL Server 2008: "Non-yielding Scheduler"

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Article ID: 970044 - View products that this article applies to.
Microsoft distributes Microsoft SQL Server 2008 fixes as one downloadable file. Because the fixes are cumulative, each new release contains all the hotfixes and all the security fixes that were included with the previous SQL Server 2008 fix release.
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SYMPTOMS

Consider the following scenario:
  • In Microsoft SQL Server 2008, you configure a database mirroring between two servers.
  • You try to break the database mirroring.
In this scenario, a "Non-yielding Scheduler" error message occurs on the mirror server, and the following error messages are logged in the SQL Server Errorlog file:
Date Time Server *
Date Time Server * BEGIN STACK DUMP:
Date Time Server * Date Time spid 0
Date Time Server *
Date Time Server * Non-yielding Scheduler
Date Time Server *
Date Time Server * *******************************************************************************
Date Time Server Stack Signature for the dump is 0x000002D9
Date Time Server External dump process return code 0x20000001.
External dump process returned no errors.
Date Time Server Process 89:0:0 (0x4f8) Worker 0x809C40E8 appears to be non-yielding on Scheduler scheduler number. Thread creation time: thread creation time. Approx Thread CPU Used: kernel approximate thread CPU used by kernel ms, user approximate thread CPU used by user ms. Process Utilization process utilization%. System Idle system idle%. Interval: internal ms.


Additionally, you must restart the SQL Server service when this issue occurs.

RESOLUTION

SQL Server 2008

The fix for this issue was first released in Cumulative Update 6. For more information about how to obtain this cumulative update package for SQL Server 2008, click the following article number to view the article in the Microsoft Knowledge Base:
971490 Cumulative update package 6 for SQL Server 2008
Note Because the builds are cumulative, each new fix release contains all the hotfixes and all the security fixes that were included with the previous SQL Server 2008 fix release. We recommend that you consider applying the most recent fix release that contains this hotfix. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
956909 The SQL Server 2008 builds that were released after SQL Server 2008 was released

SQL Server 2008 Service Pack 1

Important You must use this fix if you are running SQL Server 2008 Service Pack 1.

The fix for this issue was first released in Cumulative Update 4 for SQL Server 2008 Service Pack 1. For more information about this cumulative update package, click the following article number to view the article in the Microsoft Knowledge Base:
973602 Cumulative update package 4 for SQL Server 2008 Service Pack 1
Note Because the builds are cumulative, each new fix release contains all the hotfixes and all the security fixes that were included with the previous SQL Server 2008 fix release. Microsoft recommends that you consider applying the most recent fix release that contains this hotfix. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
970365 The SQL Server 2008 builds that were released after SQL Server 2008 Service Pack 1 was released
Microsoft SQL Server 2008 hotfixes are created for specific SQL Server service packs. You must apply a SQL Server 2008 Service Pack 1 hotfix to an installation of SQL Server 2008 Service Pack 1. By default, any hotfix that is provided in a SQL Server service pack is included in the next SQL Server service pack.

STATUS

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

REFERENCES

For more information about the Incremental Servicing Model for SQL Server, click the following article number to view the article in the Microsoft Knowledge Base:
935897 An Incremental Servicing Model is available from the SQL Server team to deliver hotfixes for reported problems


For more information about the naming schema for SQL Server updates, click the following article number to view the article in the Microsoft Knowledge Base:
822499 New naming schema for Microsoft SQL Server software update packages


For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

Properties

Article ID: 970044 - Last Review: July 27, 2009 - Revision: 3.1
APPLIES TO
  • Microsoft SQL Server 2008 Standard
  • Microsoft SQL Server 2008 Enterprise
  • Microsoft SQL Server 2008 Developer
  • Microsoft SQL Server 2008 Workgroup
Keywords: 
kbsurveynew kbexpertiseadvanced kbqfe kbfix KB970044

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