Microsoft KB Archive/835198

= FIX: Component Load Balancing may briefly drop a server from the routing table =

Article ID: 835198

Article Last Modified on 3/9/2007

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APPLIES TO


 * Microsoft Application Center 2000 Service Pack 2

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SYMPTOMS
You may notice a minor routing imbalance when you have many routed components or a very slow Microsoft COM+ application server. The routing imbalance occurs in Component Load Balancing (CLB), because a CLB internal routing table is incorrectly updated to drop servers from the routing table for a polling interval. Typically, you will only notice this behavior if you run debugging tools to track routing table updates and component response times.



CAUSE
A race condition in the routing table update routine can cause a server to be dropped from the routing list of one or more components for a polling interval. This behavior may occur if the poll response of the COM+ application server is received just before the end of a polling interval.



Hotfix information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next 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=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.

File information
The English version of this hotfix has the file attributes (or later file attributes) 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 item in Control Panel.  Date        Time   Version    Size    File name ---  20-Jan-2004  20:42  1.0.781.3  23,552  Comlbeng.dll



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



MORE INFORMATION
This hotfix updates routing table code so routing table entries are reset on the server before a polling request is sent.

For more information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Keywords: kbhotfixserver kbbug kbqfe kbfix KB835198

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