Profile Service Spinlock Problem Causes 100% CPU Consumption (307409)

The information in this article applies to:

Microsoft Commerce Server 2000 SP1

This article was previously published under Q307409

SYMPTOMS

Dllhost.exe or Inetinfo.exe may show 100% CPU consumption either in Task Manager or Performance Monitor. Further investigation using Autodump+ shows that MSCSUps is engaged in multiple spinlocks that are spread across multiple threads. Performing an IISRESET temporarily remedies the symptoms.

CAUSE

A spinlock resource is not released reliably, which results in a deadlock condition. The 100% consumption state is caused by the MSCSUps component continuously checking to see if a lock has been cleared.

WORKAROUND

To work around this problem, restart the Web service. Note that this results in lost user sessions.

RESOLUTION

To resolve this problem, obtain the latest service pack for Microsoft Commerce Server 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

297216 INFO: How to Obtain the Latest Commerce Server 2000 Service Pack

The English version of this fix should have the following file attributes or later:

   Date          Time   Version     Size     File name    Platform
   ---------------------------------------------------------------
   Sept-07-2001  14:27  4.0.2087.0  213,264  Mscsups.dll  x86

STATUS

Microsoft has confirmed that this is a problem in Microsoft Commerce Server 2000. This problem was first corrected in Commerce Server 2000 Service Pack 2.

MORE INFORMATION

For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

286350 HOW TO: Use ADPlus to Troubleshoot "Hangs" and "Crashes"

Modification Type:	Minor	Last Reviewed:	9/23/2005
Keywords:	kbHotfixServer kbQFE kbbug kbCommServ2000preSP2fix kbCommServ2000SP2fix kbfix KB307409