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HTTP 1.1 Servers That Send HTTP:304 Header Cause Early Socket Closure
Article ID: 823363 - View products that this article applies to.
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:
http://support.microsoft.com/contactus/?ws=supportNote 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.