Microsoft KB Archive/814119

= FIX: RPC Bug Causes Threads to Stop Responding in ASP/COM+ Applications =

Article ID: 814119

Article Last Modified on 10/17/2005

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APPLIES TO


 * Microsoft Windows 2000 Standard Edition

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This problem affects Microsoft Windows 2000 Service Pack 3 (SP3).



SYMPTOMS
ASP applications that make cross-process COM calls might be affected by a bug in the remote procedure call (RPC) that can cause threads to stop responding (&quot;hang&quot;). Web clients may time out, and the Requests Executing or Requests Queued performance counters may rise over time. These counters may never return to zero, even during a period when the Web site is idle.



CAUSE
A bug in the RPC runtime can cause local COM calls to stop responding. This problem occurs only when several local RPC calls are made quickly from multiple threads, and each thread has a unique set of security credentials.



Service Pack Information
To resolve this problem, obtain the latest service pack for Microsoft Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

260910 How to Obtain the Latest Windows 2000 Service Pack

Hotfix Information
A supported fix 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 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/default.aspx?scid=fh;[LN;CNTACTMS]

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 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 --  03-Feb-2003  17:11  5.0.2195.6661  431,888  Rpcrt4.dll Note Because of file dependencies, the most recent hotfix or feature that contains this file will also contain additional files such as Ole32.dll and Rpcss.dll.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Microsoft Windows 2000 Service Pack 4.



MORE INFORMATION
The bug is in several post-SP3 hotfixes, including the following critical update from Windows Update:

331953 MS03-010: Flaw in RPC Endpoint Mapper Could Allow Denial of Service Attacks

Additionally, there are several request-only hotfixes that are available from Microsoft Support that contain the bug:

326803 Some Windows 2000 OLE Hotfixes May Cause a Conflict with SP3 for Windows 2000

322953 Cannot Browse Printers When You Are Trying to Print or Browse Printer Queues

326964 Random Access Violations Occur in Rpcss

327148 The RPC Service Stops with Event ID 7031

326330 The Cluster Service Detects RPC Errors 1726 and 1722

329688 FIX: RPC_S_CALL_FAILED When You Use COM Server to Call Multithreaded Client Application

810008 Active RPC Connections Are Closed

328924 INFO: Availability of Windows 2000 Post-Service Pack 3 COM+ Hotfix Rollup Package 22

330081 INFO: Availability of Windows 2000 Post-Service Pack 3 COM+ Hotfix Rollup Package 23

810578 INFO: Availability of Windows 2000 Post-Service Pack 3 COM+ Hotfix Rollup Package 24

If you have installed any of the post-SP3 hotfixes in this list, the bug is present on your system and might cause problems when ASP pages make COM calls.

Keywords: kbhotfixserver kbqfe kbwin2ksp4fix kbfix kbwin2000presp4fix kbcomplusobj kbbug KB814119

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