Microsoft KB Archive/293150

= XADM: Leak In Repeated Calls to MAPILogonEx =

Article ID: 293150

Article Last Modified on 10/12/2005

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APPLIES TO


 * Microsoft Exchange Server 5.5 Standard Edition
 * Microsoft Exchange Server 5.5 Service Pack 1
 * Microsoft Exchange Server 5.5 Service Pack 2
 * Microsoft Exchange Server 5.5 Service Pack 3
 * Microsoft Exchange Server 5.5 Service Pack 4

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This article was previously published under Q293150



SYMPTOMS
Applications that repetitively log on to MAPI or Collaboration Data Objects (CDO) to process very large message volumes can exhibit problems after they run normally for long periods of time. The following problems might be seen:


 * Corrupt message properties
 * System resource depeletion
 * Unexpected termination



CAUSE
A memory heap that is created at the start of a MAPI session is not destroyed when the session is released.



RESOLUTION
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft Exchange Server 5.5 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/contactus/?ws=support

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.

Component:

The English version of this fix 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.

  Date         Time   Version      Size    File name -- 08/08/01 4:22:39PM 5.0.1462.14 1,210,640  wmsui32.dll NOTE: Because of file dependencies, this fix requires Microsoft Exchange Server version 5.5 Service Pack 4.



STATUS
Microsoft has confirmed that this is a problem in Microsoft Exchange Server version 5.5.



Steps to Reproduce Behavior
To reproduce the behavior, place the MAPILogonEx function in a loop construct and run the program so that the loop runs at least 6000 times. To do this, you can use the following code: while (1) {    LPMAPISESSION  lpSession = NULL; HRESULT hr; int iLoopCount; hr = MAPILogonEx(           0,            szLogonProfile,             NULL,             MAPI_NEW_SESSION | MAPI_LOGON_UI |             MAPI_NO_MAIL | MAPI_USE_DEFAULT,             &lpSession); if (hr != S_OK) {      printf (&quot;ERROR at MAPILogonEx: %x\n&quot;,hr); break; };

iLoopCount++; printf(&quot;LOGON %d\n&quot;,iLoopCount);

hr = lpSession->Logoff (NULL,NULL,0); if (hr != S_OK) {      printf (&quot;ERROR at Logoff: %x\n&quot;,hr); break; };

if (lpSession) lpSession->Release; }

Keywords: kbbug kbfix kbqfe kbexchange550presp5fix kbhotfixserver KB293150

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