Microsoft KB Archive/317935

= COM+ Loosely Coupled Event (LCE) May Not Be Fired Correctly =

Article ID: 317935

Article Last Modified on 11/15/2007

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APPLIES TO


 * Microsoft COM+ 1.5, when used with:
 * Microsoft Windows XP Professional

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This article was previously published under Q317935



SYMPTOMS
Under stress, the same loosely coupled event (LCE) may be fired repeatedly. Moreover, if a lot of do-nothing test events are fired in a short time, events may be dropped without notifying the subscriber. You can use the COMSPY instrumentation sample to monitor the number of events.

NOTE: This problem does not occur on the Microsoft Windows 2000 operating system.



CAUSE
Events can be fired repeatedly because the event starting time is reset in a loop. Events are dropped because some events obtain the same time stamp, which results in a buffer overflow.



RESOLUTION
To resolve this problem, obtain Microsoft XP COM+ Hotfix Rollup 1. For additional information, click the article number below to view the article in the Microsoft Knowledge Base:

317926 INFO: Availability of Windows XP COM+ Hotfix Rollup Package 1

A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might 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, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.



MORE INFORMATION
To resolve the problem in which events are fired repeatedly, you must reset the event starting time when the current event session is exiting. To resolve the problem in which events are dropped, you must use a more granular time stamp and use a dynamic event tracing buffer.

Additional query words: kbWinXPpreSP1COMRollup1Fix timestamp

Keywords: kbbug kbfix kbqfe kbhotfixserver KB317935

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