Microsoft distributes Microsoft SQL Server 2008 R2 Service Pack 1 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 R2 Service Pack 1 fix release.
Symptoms
The following error messages may be logged in the SQL Server error log when you use database mirroring and execute an ALTER DATABASE statement in Microsoft SQL Server 2008 R2.
Date Time spid# **Dump thread - spid = 0, EC = 0x00000004AADE8B20Date Time spid# ***Stack Dump being sent to DriveName:\MSSQLSERVER\MSSQL10_50.MSSQLSERVER\MSSQL\LOG\SQLDump0001.txtDate Time spid# * *******************************************************************************Date Time spid# *Date Time spid# * BEGIN STACK DUMP:Date Time spid# * Date Time spid#Date Time spid# *Date Time spid# * Location: DbmConnection.cpp:798Date Time spid# * Expression: CheckValidInput (wsName, cbName)Date Time spid# * SPID: #Date Time spid# * Process ID: #Date Time spid# Error: 17066, Severity: 16, State: 1.Date Time spid# SQL Server Assertion: File: <DbmConnection.cpp>, line=798 Failed Assertion = 'CheckValidInput (wsName, cbName)'. This error may be timing-related. If the error persists after rerunning the statement, use DBCC CHECKDB to check the database for structural integrity, or restart the server to ensure in-memory data structures are not corrupted.
Additionally, a mini-dump file is generated when this issue occurs.Note This issue does not occur in Microsoft SQL Server 2012.
Resolution
Cumulative update information
Cumulative Update 6 for SQL Server 2008 R2 Service Pack 2
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 R2 Service Pack 2, click the following article number to view the article in the Microsoft Knowledge Base:
2830140 Cumulative update package 6 for SQL Server 2008 R2 Service Pack 2Note 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 R2 Service Pack 2 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:
2730301 The SQL Server 2008 R2 builds that were released after SQL Server 2008 R2 Service Pack 2 was released
SQL Server 2008 R2 Service Pack 1
The fix for this issue was first released in Cumulative Update 11. For more information about how to obtain this cumulative update package for SQL Server 2008 R2 Service Pack 1, click the following article number to view the article in the Microsoft Knowledge Base:
2812683 Cumulative update package 11 for SQL Server 2008 R2 Service Pack 1Note 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 R2 Service Pack 1 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:
2567616 The SQL Server 2008 R2 builds that were released after SQL Server 2008 R2 Service Pack 1 was released
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
