Article ID: 870985 - View products that this article applies to.
Important This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/256986/ )Description of the Microsoft Windows Registry
When many clients connect to Microsoft Message Queuing, also known as MSMQ, Message Queuing may exhaust its kernel-pool memory. This problem may become worse when Message Queuing executes Active Directory queries while processing incoming messages. Validating client certificates is an example of an incoming message.
This problem may occur when many Message Queuing clients connect to Message Queuing at the same time. This causes an accumulation of Transmission Control Protocol (TCP) buffers in the kernel-pool memory. This TCP buffer-pool memory accumulation is the result of many outstanding messages that are not promptly processed by Message Queuing.
Warning If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
Hotfix informationA supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.
To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
PrerequisitesYou must have Service Pack 4 or later.
Restart requirementYou must restart your computer after you apply this hotfix.
Hotfix replacement informationThis hotfix does not replace any other hotfix.
File informationThe English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
The hotfix that is discussed in this article limits the number of clients that can connect to Message Queuing. This hotfix adds two registry entries that may cause the client to have its connection reset when that client tries to connect to Message Queuing. This behavior occurs if the threshold is reached. The client must wait until another connection is available. The new registry entries follow:
Date Time Version Size File name -------------------------------------------------------------- 13-Jul-2004 17:50 126.96.36.1992 291,088 Mq1repl.dll 22-Dec-2003 22:26 188.8.131.521 14,096 Mq1sync.exe 11-May-2004 15:34 184.108.40.2064 76,944 Mqac.sys 13-Jul-2004 17:50 220.127.116.111 217,360 Mqads.dll 20-Sep-2003 19:23 18.104.22.1681 25,360 Mqbkup.exe 13-Jul-2004 17:50 22.214.171.1245 76,560 Mqdscli.dll 13-Jul-2004 17:50 126.96.36.1993 42,256 Mqdssrv.dll 22-Dec-2003 22:26 188.8.131.521 98,064 Mqmig.exe 13-Jul-2004 17:50 184.108.40.2061 266,512 Mqmigrat.dll 13-Jul-2004 17:50 220.127.116.113 222,480 Mqoa.dll 13-Jul-2004 17:50 18.104.22.1684 10,000 Mqperf.dll 13-Jul-2004 17:50 22.214.171.1247 437,520 Mqqm.dll 13-Jul-2004 17:50 126.96.36.1998 102,672 Mqrt.dll 13-Jul-2004 17:50 188.8.131.526 70,928 Mqsec.dll 13-Jul-2004 17:50 184.108.40.2063 400,656 Mqsnap.dll 13-Jul-2004 17:50 220.127.116.112 23,824 Mqupgrd.dll 13-Jul-2004 17:50 18.104.22.1683 110,864 Mqutil.dll 13-Jul-2004 17:50 22.214.171.1248 64,784 Msmq.cpl
Use the following table to configure the new registry entries:
Collapse this tableExpand this table
When Message Queuing diagnostic logging is enabled, Message Queuing logs the following message when Message Queuing stops accepting new sessions:
When Message Queuing resumes accepting new sessions, Message Queuing logs the following message:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For additional information about how hotfix packages are named, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/816915/ )New file naming schema for Microsoft Windows software update packages