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FIX: After an AppDomain Unload, the ASP.NET Worker Process Uses 100 Percent of the CPU
Article ID: 810280 - View products that this article applies to.
Under moderate to heavy load, if an AppDomain unload occurs, the ASP.NET Worker Process (Aspnet_wp.exe) may use 100 percent of the CPU on a single-processor computer. When this problem occurs on a multiprocessor computer, the Aspnet_wp.exe process uses 100 percent of one of the processors.
A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers 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 fix.
To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. 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/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 typical support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
The P1 version of this fix 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 -------------------------------------------------------------- 23-Jan-2003 17:41 1.0.3705.398 196,608 Aspnet_isapi.dll 23-Jan-2003 17:35 4,169 Aspnet_perf.h 23-Jan-2003 17:35 20,468 Aspnet_perf.ini 23-Jan-2003 17:35 20,342 Aspnet_perf2.ini 23-Jan-2003 17:41 1.0.3705.398 24,576 Aspnet_regiis.exe 23-Jan-2003 17:41 1.0.3705.398 28,672 Aspnet_wp.exe 23-Jan-2003 17:03 1.0.3705.398 69,632 Corperfmonext.dll 23-Jan-2003 17:01 1.0.3705.398 303,104 Mscorjit.dll 24-Jan-2003 04:40 1.0.3705.398 1,953,792 Mscorlib.dll 21-Jan-2003 14:55 10,284 Mscorlib.ldo 23-Jan-2003 17:02 1.0.3705.398 2,269,184 Mscorsvr.dll 23-Jan-2003 17:01 1.0.3705.398 2,269,184 Mscorwks.dll 01-Aug-2002 14:38 15 Smartnav.htm 17-Oct-2002 10:55 8,728 Smartnav.js 24-Jan-2003 04:42 1.0.3705.398 1,191,936 System.web.dll
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.