Microsoft small business knowledge base

Article ID: 319007 - Last Review: February 27, 2014 - Revision: 2.0

This article was previously published under Q319007
This article has been archived. It is offered "as is" and will no longer be updated.


When COM+ tries to shut down an application because the idle time limit has been reached, the Dllhost.exe process may stop responding (hang) and may consume 100 percent of the processor (CPU). This problem occurs only if you configure the application as Queued and Listening.


When the shutdown process is initiated, the process acquires the lock for the threading pool first and then waits for the threads in the pool to exit. At the same time, the queued component (QC) thread (which is also member of the pool) tries to acquire the same lock in a tight loop. As a result, this situation causes both a deadlock and 100 percent CPU utilization.


To resolve this problem, obtain Microsoft COM+ Hotfix Rollup 19. For additional information, click the article number below to view the article in the Microsoft Knowledge Base:
318105  ( ) INFO: Availability of Windows 2000 Post-Service Pack 2 COM+ Hotfix Rollup Package 19
To resolve this problem, obtain the latest service pack for 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


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 Windows 2000 Service Pack 3.

  • Microsoft COM+ 1.0, when used with:
    • Microsoft Windows 2000 Standard Edition
kbnosurvey kbarchive kbbug kbfix kbwin2000presp3fix kbwin2000sp3fix KB319007
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