Microsoft KB Archive/914453

= Web applications that use chunked encoding stop responding when you access them from a Windows Server 2003-based or from a Windows XP-based computer =

Article ID: 914453

Article Last Modified on 6/1/2007

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APPLIES TO


 * Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows XP Professional

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Important This article contains information about how to modify the registry. Make sure to back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows registry



SYMPTOMS
You access Web applications or Web sites from a Web server that uses chunked transfer encoding on a Microsoft Windows Server 2003-based or on a Microsoft Windows XP-based computer. Then, the browser or the Web applications stop responding.



CAUSE
This problem occurs when the Wininet.dll file receives an incomplete chunk of data during the initial Winsock data receive operation. When this behavior occurs, the second Winsock data receive operation reads only a chunk token. For example, the second Winsock data receive operation may only read carriage-return line-feed (CRLF) from the socket. Then, the Wininet.dll file makes continuous calls to the Winsock Select function for 30 seconds. The file is waiting to receive more data. However, if no data arrives, the browser or the Web application stops responding.



Service pack information
To resolve this problem, obtain the latest service pack for Windows Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

889100 How to obtain the latest service pack for Windows Server 2003

Prerequisites
No prerequisites are required.

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.

After you install the hotfix, you must modify the registry to enable the hotfix. To do this, follow these steps: Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall your operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.  Click Start, click Run, type Regedit, and then click OK. To enable this hotfix per user, locate and then click the following registry subkey:

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl

To enable this hotfix per computer, locate and then click the following registry subkey:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl

 Click the registry subkey that you located in step 2. On the Edit menu, point to New, and then click Key. Type FEATURE_CHUNK_TIMEOUT_KB914453, and then press ENTER. Click the registry key you created in step 5.</li> On the Edit menu, point to New, and then click Key.</li> Type Settings, and then press ENTER.</li> Click FEATURE_CHUNK_TIMEOUT_KB914453.</li> On the Edit menu, point to New, and then click DWORD Value.</li> Type Iexplore.exe, and then press ENTER.</li> On the Edit menu, click Modify.</li> In the Value data box, type 1, and then click OK.

Note The valid values for the subkey are 0 and 1. A value of 1 enables the hotfix, and a value of 0 disables the hotfix.</li> Click FEATURE_CHUNK_TIMEOUT_KB914453.</li> Click Settings.</li> On the Edit menu, point to New, and then click DWORD Value.</li> Type ChunkSelectTimeout, and then press ENTER.</li> On the Edit menu, click Modify.</li> In the Value data box, type FFFFFFFF, and then click OK.

Note The valid values for the subkey are based on a delay. A value of FFFFFFFF enables the hotfix, and any other value indicates the time-out value.</li> Exit Registry Editor.</li></ol>

Note If you update the  registry subtree, you must restart the computer. Then, you must log off and log on the computer to see the behavior changes.

Hotfix information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it 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 XP Service Pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product 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
No prerequisites are required.

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.

After you install the hotfix, you must modify the registry to enable the hotfix. To do this, follow these steps: Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall your operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk. <ol> Click Start, click Run, type Regedit, and then click OK.</li> To enable this hotfix per user, locate and then click the following registry subkey:

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl

To enable this hotfix per computer, locate and then click the following registry subkey:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl

</li> <li>Click the registry key you located in step 2.</li> <li>On the Edit menu, point to New, and then click Key.</li> <li>Type FEATURE_CHUNK_TIMEOUT_KB914453, and then press ENTER.</li> <li>Click the registry key you created in step 5.</li> <li>On the Edit menu, point to New, and then click Key.</li> <li>Type Settings, and then press ENTER.</li> <li>Click FEATURE_CHUNK_TIMEOUT_KB914453.</li> <li>On the Edit menu, point to New, and then click DWORD Value.</li> <li>Type Iexplore.exe, and then press ENTER.</li> <li>On the Edit menu, click Modify.</li> <li>In the Value data box, type 1, and then click OK.

Note The valid values for the subkey are 0 and 1. A value of 1 enables the hotfix, and a value of 0 disables the hotfix.

</li> <li>Click FEATURE_CHUNK_TIMEOUT_KB914453.</li> <li>Click Settings.</li> <li>On the Edit menu, point to New, and then click DWORD Value.</li> <li>Type ChunkSelectTimeout, and then press ENTER.</li> <li>On the Edit menu, click Modify.</li> <li>In the Value data box, type FFFFFFFF, and then click OK.

Note The valid values for the subkey are based on a delay. A value of FFFFFFFF enables the hotfix, and any other value indicates the time-out value.</li> <li>Exit Registry Editor.</li></ol>

Note If you update the  registry subtree, you must restart the computer. Then, you must log off and log on the computer to see the behavior changes.

<div class="workaround_section">

WORKAROUND
To work around this problem, use one of the following options:
 * Disable the chunked encoding from the Web server. For more information about whether the Web server lets you disable chunked encoding, and for information about how to disable chunked encoding, see the Web server product documentation.
 * Disable the HTTP 1.1 settings in Microsoft Internet Explorer. To do this, follow these steps:
 * Close all the currently active Internet Explorer windows.
 * Start Internet Explorer.
 * On the Tools menu, click Internet Options.
 * In the Internet Options dialog box, click the Advanced tab.
 * Under HTTP 1.1 settings in the Settings list, click to clear the Use HTTP 1.1 check box.
 * Under HTTP 1.1 settings, click to clear the Use HTTP 1.1 through proxy connections check box, and then click OK.

<div class="status_section">

STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section. This problem was first corrected in Windows Server 2003 Service Pack 2.

<div class="moreinformation_section">

MORE INFORMATION
For more information about standard terminology that is used to describe Microsoft software updates, 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: kbwinserv2003sp2fix kbwinserv2003presp2fix kbwinxppresp3fix kbbug kbfix kbhotfixserver kbqfe kbpubtypekc KB914453

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