XADM: Paged Pool Memory Leak Caused by Attachment Processing

ID: Q192592

The information in this article applies to:

Microsoft Exchange Server, versions 5.0, 5.5

SYMPTOMS

While using a MAPI application that processes attachments, paged pool memory increases over time without decreasing. There may be visible problems with the desktop user-interface failing to process normally (failing to repaint the screen properly, and missing images).

CAUSE

When MAPI tries to obtain an icon image to display for the file attachment, memory is allocated for the icon, and is not freed. The memory allocation is small, but some messaging applications which process many messages with attachments may be subject to this problem.

RESOLUTION

MAPI has been corrected to free the memory allocation.

Exchange Server 5.0

A supported fix that corrects this problem is now available from Microsoft, but has not been fully regression-tested and should be applied only to systems experiencing this specific problem. If you are not severely affected by this specific problem, Microsoft recommends that you wait for the next Microsoft Exchange Server version 5.0 service pack that contains this fix.

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 on support costs, please go to the following address on the World Wide Web:

http://www.microsoft.com/support/supportnet/overview/overview.asp

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

Component: MAPI


   File Name     Version
   -----------------------
   Mapi32.dll 5.0.1461.62

Exchange Server 5.5

To resolve this problem, obtain the latest service pack for Exchange Server version 5.5. For more information, please see the following article in the Microsoft Knowledge Base:

Q191014 XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack

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

Component: MAPI


   File Name     Version
   -----------------------
   MAPI32.DLL    5.5.2395.0

STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 5.0 and 5.5.

Additional query words: MAPI Leak XCLN

Keywords : exc55sp2fix
Version : WinNT:5.0,5.5
Platform : WINDOWS
Issue type : kbbug