Valid subscribers may no longer receive all events when one unregisters its subscription

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Article ID: 819995 - View products that this article applies to.
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The Microsoft COM+ event system may generate the following event log notifications:
Event Type: Warning
Event Source: EventSystem
Event Category: Event Service
Event ID: 4106
Date: 3/14/2002
Time: 2:34:46 PM
User: N/A
Computer: N/A
Description: The COM+ Event System detected a corrupt IEventSubscription object. The COM+ Event System has removed object ID {...}.
The subscriber will no longer be notified when the event occurs.


When a publisher fires an event, the COM+ event system enumerates all subscribers to trigger the event on all subscribers. If a subscriber unregisters a transient subscription during this enumeration, the whole enumeration can fail, and the publishing fails altogether.


How to obtain the hotfix

This issue is fixed in the Microsoft Windows 2000 Post-Service Pack 4 (SP4) COM+ 1.0 Hotfix Package 27. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
822618 Availability of Windows 2000 Post-Service Pack 4 COM+ Hotfix Rollup Package 27


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


Article ID: 819995 - Last Review: February 27, 2014 - Revision: 3.0
  • Microsoft Windows 2000 Server
  • Microsoft Windows 2000 Professional Edition
  • Microsoft Windows 2000 Advanced Server
  • Microsoft COM+ 1.0
  • Microsoft Windows 2000 Datacenter Server
kbnosurvey kbarchive kbbug kbfix kbqfe kbwin2000presp5fix KB819995

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