SYMPTOMS
An event handle leak and a memory leak may occur when you are using
IMessageFilter to handle incoming COM calls. Use the hotfix that is described in this article only if all of the following conditions exist:
- The client implements IMessageFilter and SERVERCALL_RETRYLATER is returned in the implemented IMessageFilter::HandleInComingCall function.
- The IMessageFilter::HandleInComing call in the client is called as a result of the COM layer synchronizing calls because of cross-apartment communication. An example of this is a single-threaded apartment (STA) client process calling out a multiple-threaded apartment (MTA) COM server process and the MTA COM server process calling back into the STA client process
- The client that implements IMessageFilter is running on Windows NT 4.0. If the client is running on Microsoft Windows 2000, the leak does not occur.
- The client process has a visible handle leak that you can observe by using a process-monitoring tool such as Windows Task Manager.
- The client process has a visible memory leak that you can observe by using a process-monitoring tool such as Windows Task Manager.
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.
To resolve this problem, 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:
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 usual 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
-----------------------------------------------------------------
29-Aug-2001 20:44 4.0.1381.7102 701,200 Ole32.dll i386
29-Aug-2001 20:44 4.0.1381.7102 107,280 Rpcss.exe i386
24-Aug-2001 03:26 4.0.1381.7102 1,239,824 Ole32.dll Alpha
24-Aug-2001 03:26 4.0.1381.7102 183,568 Rpcss.exe Alpha
NOTE: Because of file dependencies, this hotfix requires Microsoft Windows NT 4.0 Service Pack 6a.