On a computer that is running Windows 7 or Windows Server 2008 R2, the HTTP protocol stack (Http.sys) is used to receive HTTP requests from clients. For example, you have Internet Information Services (IIS) installed, or you have an application that uses the System.Net.HttpListener class installed.
The computer receives an HTTP request from a client through the TLS/SSL protocol.
The client sends a TCP-FIN signal to the computer to indicate that it has half-closed the connection on the client side and that there is nothing more to send.
In this scenario, the computer may intermittently send an abortive TCP-RST signal to the client rather than send any HTTP response. When this issue occurs, an exception may occur on the client side, and it indicates that the server has aborted the connection.
Note If you capture the Event Tracing for Windows (ETW) trace for Http.sys when this issue occurs, you will notice that Http.sys raises the following internal error code before it sends the TCP-RST signal to the client:
You can see a typical report that resembles the following when you use the Microsoft Network Monitor 3.4 utility to open the ETW trace for Http.sys:
MicrosoftWindowsHttpService MicrosoftWindowsHttpService:Client closed the connection (connection pointer <<address>>). Status of whether closed by TCP Reset: 0 (0x0).
MicrosoftWindowsHttpService MicrosoftWindowsHttpService:SSL connection will be disconnected as initiated by the client.
MicrosoftWindowsHttpService MicrosoftWindowsHttpService:SSL handshake completed with status: 0 (0x0).
MicrosoftWindowsHttpService MicrosoftWindowsHttpService:Decrypted SSL data is available for processing.
MicrosoftWindowsHttpService MicrosoftWindowsHttpService:SSL connection will be disconnected as initiated by the server application. Status: 3221225488 (0xC0000010).
Note The "0xC0000010" error code translates to STATUS_INVALID_DEVICE_REQUEST and has the following description:
The specified request is not a valid operation for the target device.
This issue occurs because Http.sys incorrectly assumes that the client-side has ended the connection. Therefore Http.sys ends the underlying TCP/IP connection.
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 the problem described in this article. 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.
To apply this hotfix, you must be running one of the following operating systems:
Windows 7 Service Pack 1 (SP1)
Windows Server 2008 R2
Windows Server 2008 R2 Service Pack 1 (SP1)
For more information about how to obtain a Windows 7 or Windows Server 2008 R2 service pack, click the following article number to view the article in the Microsoft Knowledge Base:
976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2
To use the hotfix in this package, you do not have to make any changes to the registry.
You must restart the computer after you apply this hotfix.
Hotfix replacement information
This hotfix does not replace a previously released hotfix.
The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.
Windows 7 and Windows Server 2008 R2 file information notes
Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.
The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:
Windows 7 and Windows Server 2008 R2
Windows 7 and Windows Server 2008 R2
The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows 7 and for Windows Server 2008 R2" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.
For all supported x86-based versions of Windows 7
For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
For all supported IA-64-based versions of Windows Server 2008 R2
To work around the issue, make sure that the client waits for the server's response before it sends a TCP-FIN signal to the server. Note You can work around this issue only on the client side of the connection.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about Microsoft Network Monitor 3.4, visit the following Microsoft website:
Windows Server 2008 R2 Enterprise, Windows Server 2008 R2 Standard, Windows Server 2008 R2 Datacenter, Windows Server 2008 R2 for Itanium-Based Systems, Windows Server 2008 R2 Foundation, Windows Web Server 2008 R2, Windows 7 Enterprise, Windows 7 Home Basic, Windows 7 Home Premium, Windows 7 Professional, Windows 7 Starter, Windows 7 Ultimate