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FIX: Errors when a client application sends an attention signal to SQL Server 2008 or SQL Server 2008 R2

Symptoms
Consider the following scenario:
  • A client application connects to an instance of Microsoft SQL Server 2008 or of Microsoft SQL Server 2008 R2.
  • A query time-out occurs when SQL Server resets the connection between SQL Server 2008 or SQL Server 2008 R2 and the client application. Or, the client application sends an attention signal explicitly by canceling the query to the instance of SQL Server.
In this scenario, SQL Server performs a force close of the connection, and you may receive one of the following error messages:
  • Error message 1
    A severe error occurred on the current command. The results, if any, should be discarded.
  • Error message 2
    A transport-level error has occurred when receiving results from the server. (provider: TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host.)
Additionally, an error message that resembles the following is logged in the SQL Server Errorlog file:

<Date><Time> <spid> Error: 18056, Severity: 20, State: 29.
<Date><Time> <spid> The client was unable to reuse a session with <SPID>, which had been reset for connection pooling. The failure ID is 29. This error may have been caused by an earlier operation failing. Check the error logs for failed operations immediately before this error message.


Resolution

Cumulative update information

SQL Server 2008 R2 Service Pack 2

The fix for this issue was first released in Cumulative Update 1 for SQL Server 2008 R2 Service Pack 2. For more information about how to obtain this cumulative update package, click the following article number to view the article in the Microsoft Knowledge Base:
2720425 Cumulative Update package 1 for SQL Server 2008 R2 Service Pack 2
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 R2 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 Service Pack 3

The fix for this issue was first released in Cumulative Update 6 for SQL Server 2008 Service Pack 3. For more information about this cumulative update package, click the following article number to view the article in the Microsoft Knowledge Base:
2715953 Cumulative update package 6 for SQL Server 2008 Service Pack 3
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:
2629969 The SQL Server 2008 builds that were released after SQL Server 2008 Service Pack 3 was released
Microsoft SQL Server 2008 hotfixes are created for specific SQL Server service packs. You must apply a SQL Server 2008 Service Pack 3 hotfix to an installation of SQL Server 2008 Service Pack 3. By default, any hotfix that is provided in a SQL Server service pack is included in the next SQL Server service pack.

SQL Server 2008 R2

The fix for this issue was first released in Cumulative Update 14. For more information about how to obtain this cumulative update package for SQL Server 2008 R2, click the following article number to view the article in the Microsoft Knowledge Base:
2703280 Cumulative Update package 14 for SQL Server 2008 R2
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 R2 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:
981356 The SQL Server 2008 R2 builds that were released after SQL Server 2008 R2 was released

SQL Server 2008 Service Pack 1

The fix for this issue was first released in Cumulative Update 14 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:
2527187 Cumulative update package 14 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:
956909 The SQL Server 2008 builds that were released after SQL Server 2008 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.

SQL Server 2008 Service Pack 2

The fix for this issue was first released in Cumulative Update 10 for SQL Server 2008 Service Pack 2. For more information about this cumulative update package, click the following article number to view the article in the Microsoft Knowledge Base:
2696625 Cumulative update package 10 for SQL Server 2008 Service Pack 2
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:
2402659 The SQL Server 2008 builds that were released after SQL Server 2008 Service Pack 2 was released
Microsoft SQL Server 2008 hotfixes are created for specific SQL Server service packs. You must apply a SQL Server 2008 Service Pack 2 hotfix to an installation of SQL Server 2008 Service Pack 2. By default, any hotfix that is provided in a SQL Server service pack is included in the next SQL Server service pack.

SQL Server 2008 R2 Service Pack 1

The fix for this issue was first released in Cumulative Update 6 for SQL Server 2008 R2 Service Pack 1. For more information about how to obtain this cumulative update package, click the following article number to view the article in the Microsoft Knowledge Base:
2679367 Cumulative Update package 6 for SQL Server 2008 R2 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 R2 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.
More information
For more information about this problem, including troubleshooting steps, see the following blog post from the SQL Server Escalation services team:
Properties

Article ID: 2543687 - Last Review: 10/18/2013 19:17:00 - Revision: 13.0

Microsoft SQL Server 2008 Standard, Microsoft SQL Server 2008 Developer, Microsoft SQL Server 2008 Workgroup, Microsoft SQL Server 2008 Enterprise, Microsoft SQL Server 2008 Enterprise Evaluation, Microsoft SQL Server 2008 Express, Microsoft SQL Server 2008 R2 Standard, Microsoft SQL Server 2008 R2 Developer, Microsoft SQL Server 2008 R2 Workgroup, Microsoft SQL Server 2008 R2 Enterprise, Microsoft SQL Server 2008 R2 Datacenter, Microsoft SQL Server 2008 R2 Express

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