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Q182318: XCON: Mad.exe Reaches 100% After You Recalculate Routing

Article: Q182318
Product(s): Microsoft Exchange
Version(s): WinNT:5.0
Operating System(s): 
Keyword(s): 
Last Modified: 03-APR-1999

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The information in this article applies to:

- Microsoft Exchange Server, version 5.0 
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SYMPTOMS
========

When you click the Recalculate Routing button on the Routing tab of the Site
Addressing property page in the Microsoft Exchange Administrator program to
recalculate the routing on Exchange Server 5.0, the Mad.exe process may use 100
percent of the CPU.

In the Windows NT Performance Monitor, you will see that the % Processor Time for
the MAD process goes to 100 percent and does not drop from this figure even when
left for 24 hours.

CAUSE
=====

The message transfer agent (MTA) has hit a loop in the routing recalculation
code.


STATUS
======

Microsoft has confirmed this to be a problem in Microsoft Exchange Server
version 5.0


A supported fix is now available, but has not been fully regression-tested and
should be applied only to systems experiencing this specific problem. Unless you
are severely impacted by this specific problem, Microsoft recommends that you
wait for the next Service Pack that contains this fix. Contact Microsoft
Technical Support for more information.

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Keywords          :  
Technology        : kbExchangeSearch kbExchange500 kbZNotKeyword2
Version           : WinNT:5.0
Issue type        : kbbug
Solution Type     : kbfix

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