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In Microsoft Windows Server 2003, a stack overflow may occur in the Svchost.exe process that is hosting the COM+ Event System service. The stack overflow orphans a remote procedure call (RPC) critical section and deadlocks any other RPC calls from the process. At this point, every new instance of the Dllhost.exe process that tries to spawn becomes blocked when the instances try to subscribe to the COM+ Event System service. Dozens of Dllhost.exe processes continue to spawn until the computer’s heap is exhausted.
Service pack information
To resolve this problem, obtain the latest service pack for Windows Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
889100 How to obtain the latest service pack for Windows Server 2003
Hotfix rollup package information
This problem is fixed in the Microsoft COM+ hotfix rollup package that is described in Microsoft Knowledge Base article 912818. For more information about this COM+ hotfix rollup package, click the following article number to view the article in the Microsoft Knowledge Base:
912818 Availability of Windows Server 2003 Post-Service Pack 1 COM+ 1.5 Hotfix Rollup Package 8
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Windows Server 2003 Service Pack 2.
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