HTTP 1.1 Servers That Send HTTP:304 Header Cause Early Socket Closure

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Article ID: 823363 - View products that this article applies to.
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Managed applications that target the .NET Framework 1.1 and that use sockets when they communicate with HTTP 1.1 servers (for example, with Internet Information Services 6.0) open a new socket if the server sends an HTTP 304 ("not modified") response header with the Content Length: 0.
This behavior may cause application overload when the application can use the same socket that it initially used to communicate with the server.


A supported fix is now available from Microsoft, but it is only intended to correct the problem described in this article. Only apply it to systems that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next .NET Framework 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:
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.

The English version of this hotfix has the file attributes (or later) 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.
   Date         Time   Version              Size  File name
02-Jul-2003  21:58  1.1.4322.919      253,952  Aspnet_isapi.dll
02-Jul-2003  21:58  1.1.4322.919       20,480  Aspnet_regiis.exe
02-Jul-2003  21:58  1.1.4322.919       32,768  Aspnet_wp.exe
15-May-2003  23:49                     33,522  Installpersistsqlstate.sql
15-May-2003  23:49                     34,150  Installsqlstate.sql
03-Jul-2003  12:20  1.1.4322.919    1,216,512  System.dll
02-Jul-2003  21:54                     14,472  Webuivalidation.js
03-Jul-2003  12:19  1.1.4322.919    1,249,280  System.Web.dll



Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.


Article ID: 823363 - Last Review: October 25, 2005 - Revision: 2.4
  • Microsoft .NET Framework 1.1
kbhotfixserver kbqfe kbqfe kbfix kbbug KB823363

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