Microsoft KB Archive/944099

= FIX: Error message when you use the SQL Native Client data provider to connect to an instance of SQL Server 2005 that is configured to use database mirroring: &quot;Internal .Net Framework Data Provider error 6&quot; =

Article ID: 944099

Article Last Modified on 12/3/2007

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APPLIES TO


 * Microsoft .NET Framework 2.0
 * Microsoft .NET Framework 2.0 IA64 Edition
 * Microsoft .NET Framework 2.0 x64 Edition

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SYMPTOMS
Consider the following scenario. In an application, you use the SQL Native Client data provider to connect to an instance of Microsoft SQL Server 2005. The instance of SQL Server 2005 is configured to use database mirroring. Additionally, you specify a failover partner server in the connection string of the application. In this scenario, you may receive the following error message when you connect to the principal server after failover occurs:

Internal .Net Framework Data Provider error 6

Additionally, the following error message may be logged in the SQL Server error log:

Error: 18456, Severity: 14, State: 16.

Login failed for user /



CAUSE
This problem occurs because the code in the System.Data.dll file does not correctly process state changes for the current connections in the connection pool. This behavior occurs when you specify a failover partner server in the connection string of the application.



Hotfix information
A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft .NET Framework 2.0 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Restart information
You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

Hotfix file information
This hotfix contains only those files that are required to correct the issues that this article lists. This hotfix may not contain all the files that you must have to fully update a product to the latest build.

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

The .NET Framework 2.0, Itanium-based versions


STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
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

Keywords: kbfix kbqfe kbpubtypekc kbexpertiseadvanced kbhotfixserver KB944099

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