Microsoft KB Archive/829589

= FIX: RPC on Windows 2000 Server returns random &quot;access denied&quot; or &quot;invalid security&quot; error messages to the client =

Article ID: 829589

Article Last Modified on 10/26/2005

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APPLIES TO


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Professional Edition
 * Microsoft Windows 2000 Advanced Server

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SYMPTOMS
When a client makes local Component Object Model (COM) calls or remote procedure calls (RPCs) on a computer that is running Microsoft Windows 2000 Server, the server may return random &quot;Access Denied&quot; or &quot;Invalid Security Context&quot; error messages to the client.



CAUSE
When the server is experiencing a high load, or a high call volume, you may receive the error messages that are described in the &quot;Symptoms&quot; section of this article because a distributed COM (DCOM) client incorrectly deletes a security context that is still being used. When the server tries to impersonate the client, it cannot because the security context is no longer valid. The server then returns an error message back to the client..



RESOLUTION
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

To resolve this problem, 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.

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 -  03-Oct-2003  22:10  5.0.2195.6824  945,936  Ole32.dll 03-Oct-2003 22:10  5.0.2195.6862  432,912  Rpcrt4.dll 03-Oct-2003 22:10  5.0.2195.6824  192,272  Rpcss.dll 19-Sep-2003 23:51  5.3.23.4         6,656  Spmsg.dll



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section of this article.

