Microsoft KB Archive/943240

= FIX: Error message when IIS 6.0 receives the entity body for an HTTP POST request while an application pool is recycled: &quot;The underlying connection was closed&quot; =

Article ID: 943240

Article Last Modified on 12/3/2007

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APPLIES TO


 * Microsoft Internet Information Services 6.0

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SYMPTOMS
Consider the following scenario. Internet Information Services (IIS) 6.0 receives the entity body for an HTTP POST request from a client computer. At the same time, an application pool is recycled. In this scenario, the HTTP POST request may be disconnected. Therefore, you may receive an error message that resembles the following on the client computer:

The underlying connection was closed

When this problem occurs, the following error message is logged in the HTTP error log on the server computer:

HTTP/1.1 Method URI - SiteID Connection_Abandoned_By_AppPool ApplicationPool

Note By default, the HTTP error log is in the following location:

\System32\httperr\



CAUSE
This problem occurs because the Http.sys driver stops processing requests for the application pool that is recycled.



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 Windows Server 2003 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.

Prerequisites
You can apply this hotfix only on a computer that is running Windows Server 2003 Service Pack 1 (SP1) or Windows Server 2003 Service Pack 2 (SP2).

Restart requirement
You must 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.

Windows Server 2003 with SP2, Itanium-based systems


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 the HttpReceiveRequestEntityBody function, visit the following Microsoft Developer Network (MSDN) Web site:

http://msdn2.microsoft.com/en-us/library/aa364496.aspx

For more information about how worker process recycling works in IIS 6.0, visit the following Microsoft TechNet Web site:

http://www.microsoft.com/technet/prodtechnol/WindowsServer2003/Library/IIS/3ee19598-ec90-4570-a4a5-d93a24400b99.mspx?mfr=true

Keywords: kbqfe kbexpertiseinter kbhotfixserver KB943240

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