FIX: Applications That Use MSMQ and C++ ATL Objects May Stop Responding (274360)


The information in this article applies to:

  • Microsoft Message Queue Server (MSMQ) 1.0, when used with:
    • the operating system: Microsoft Windows NT 4.0
This article was previously published under Q274360

SYMPTOMS

Applications that use Microsoft Message Queuing (MSMQ) through C++ Active Templates Library (ATL) may stop responding. User dumps show a deadlock situation where one thread holds a critical section for RPC looking to load a DLL (Mqrt.dll), and a second thread holds the critical section to load a DLL while waiting on the critical section for RPC.

CAUSE

The DLLMain function in Mqrt.dll contains a number of synchronization calls that expose the possibility of a deadlock.

RESOLUTION

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 Microsoft Windows NT 4.0 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 version of this fix should have the following file attributes or later: 
Date          Time   Version      Size    File name     Platform
------------------------------------------------------------------------
22-AUG-2000   05:21  312        56,592    Mqdssrv.dll   Windows NT 4.0
22-AUG-2000   05:21  312       227,088    Mqis.dll      Windows NT 4.0
22-AUG-2000   05:21  312       504,080    Mqqm.dll      Windows NT 4.0
22-AUG-2000   05:21  312       110,352    Mqrt.dll      Windows NT 4.0
22-AUG-2000   05:21  312       106,768    Mqutil.dll    Windows NT 4.0

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:10/7/2005
Keywords:kbbug kbfix KB274360
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