SQL Server 2000 Service Pack 4 stops responding after you close a SQL Server connection on a computer that is running Windows Server 2003 Service Pack 1

Microsoft SQL Server 2000 Service Pack 4 (SP4) stops responding (hangs) after you close a SQL Server connection. This problem occurs on a computer that is running Microsoft Windows Server 2003 Service Pack 1 (SP1). Additionally, SQL Server does not accept any connection requests. When this problem occurs, the following error message may be logged in the SQL Server error log:

This problem occurs because a Dbnetlib.dll file transfers an invalid socket handle to the closesocket function when you close a SQL Server connection. This invalid socket handle blocks TCP/IP activity. Therefore, SQL Server stops responding and does not accept any connection requests.

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Restart requirement

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

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

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.

Microsoft Windows Server 2003, x86-based versions

Microsoft Windows Server 2003, x64-based versions

Microsoft Windows Server 2003, Itanium-based versions

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