Microsoft KB Archive/904842

= FIX: The WinHttpSendRequest function call may not be returned when you use Windows HTTP Services 5.1 to send asynchronous HTTP requests in Windows 2000 =

Article ID: 904842

Article Last Modified on 6/2/2006

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APPLIES TO

 Microsoft Internet Explorer 5.01 Microsoft Windows HTTP Services 5.1, when used with:  Microsoft Windows 2000 Datacenter Server

 Microsoft Windows 2000 Professional Edition

 Microsoft Windows 2000 Advanced Server

 Microsoft Windows 2000 Server</li></ul> </li></ul>

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<div class="notice_section">

<div class="symptoms_section">

SYMPTOMS
When you use Microsoft Windows HTTP Services (WinHTTP) 5.1 in Microsoft Windows Server 2000 to send asynchronous HTTP requests, the WinHttpSendRequest function call may not be returned. This problem may occur if the underlying asynchronous select socket that Windows HTTP Services uses experiences an error.

<div class="cause_section">

CAUSE
This problem occurs because of an error-handling problem in the internal implementation of the Windows HTTP Services 5.1 library. The Windows HTTP Services 5.1 library may not correctly handle socket errors that occur in the asynchronous socket. This problem may prevent Windows HTTP Services from sending new requests after a socket error has occurred.

<div class="resolution_section">

Hotfix information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

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

http://support.microsoft.com/default.aspx?scid=fh;[LN;CNTACTMS]

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
Microsoft Windows 2000

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 tool in Control Panel. <pre class="fixed_text">  Date         Time   Version        Size     File name ---  31-Aug-2005  01:29  5.1.2600.2749  351,232  Winhttp.dll

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

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MORE INFORMATION
For more information about the WinHttpSendRequest function, visit the following Microsoft Developer Network (MSDN) Web site:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winhttp/http/winhttpsendrequest.asp

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

Additional query words: WinHTTP Async 0xFFFFFFFE p_AsyncThread m_lSelectInterrupts -2

Keywords: kbtshoot kbfix kbbug kbqfe kbhotfixserver KB904842

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