Excessive number of listening ports when you install Message Queuing on a computer with multiple IP addresses (310707)


The information in this article applies to:

  • Microsoft Message Queuing 2.0
This article was previously published under Q310707

SYMPTOMS

When you install Microsoft Message Queuing, also known as MSMQ, on a computer with multiple IP addresses, it opens a set of remote procedure call (RPC) listening ports for each IP address. This can result in hundreds of listening ports on a computer with 25 or more IP addresses. This behavior can be observed when you use the netstat -a command.

CAUSE

This behavior can occur because Message Queuing enumerates the IP addresses on the computer and opens a set of its RPC listening ports for each IP address.

RESOLUTION

This fix restricts the enumeration code for use only on clusters where the Message Queuing service should establish listening ports only for IP addresses within the cluster group and not for all IP addresses assigned to a computer.

On nonclustered computers, an RPC bind is issued to listen on any address, which results in one set of RPC listening ports. This also allows for the addition of IP addresses to the computer without requiring a restart of the Message Queuing service on a nonclustered computer.

A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Windows 2000 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The typical support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The English-language version of this fix should have the following file attributes or later: 
   Date           Time     Version        Size     File name     
   ---------------------------------------------------------
   05/29/2001    15:22     5.0.0.735       70k     mqac.sys
   09/05/2001    16:59     5.0.0.735      210k     mqads.dll
   09/05/2001    16:59     5.0.0.735       41k     mqdssrv.dll
   09/05/2001    16:59     5.0.0.740      218k     mqoa.dll
   09/05/2001    16:59     5.0.0.741      409k     mqqm.dll
   09/05/2001    16:59     5.0.0.738       90k     mqrt.dll
   09/05/2001    16:59     5.0.0.738       69k     mqsec.dll
   09/05/2001    16:59     5.0.0.738      106k     mqutil.dll
   05/30/2001    00:03     5.0.2195.3649    4k     spmsg.dll

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.
Modification Type:MinorLast Reviewed:10/6/2005
Keywords:kbprb kbQFE KB310707
©2004 Microsoft Corporation. All rights reserved.