Q279717: Memory Leak in Db2serv.exe

Article: Q279717
Product(s): Microsoft SNA Server
Version(s): 4.0 SP3
Operating System(s): 
Keyword(s): kbDSupport kbsna400sp3 kbhis2000kbbuglist kbfixlist
Last Modified: 08-MAY-2002

-------------------------------------------------------------------------------
The information in this article applies to:

- Microsoft Host Integration Server 2000 
- Microsoft SNA Server, version 4.0 SP3 
-------------------------------------------------------------------------------

SYMPTOMS
========

A memory leak in the Db2serv.exe file may be observed, as monitored by
Performance Monitor (PerfMon) or Task Manager, when you run a simple Visual
Basic application that does the following:

1. Opens a connection (leaves it open).

2. Opens a command object.

3. Runs 1000 iterations that consist of calling a Stored Procedure (SP) by using
  the DB2OLEDB driver.

4. Closes the command object.

5. When all iterations are done, it closes the connection object.

CAUSE
=====

Memory that was being allocated by the agent for the output parameter is not
being released correctly.

RESOLUTION
==========

A supported fix is now available from Microsoft, but it is only intended to
correct the problem described in this article and should be applied only to
systems experiencing this specific problem. This fix may receive additional
testing at a later time, to further ensure product quality. Therefore, if you
are not severely affected by this problem, Microsoft recommends that you wait
for the next Microsoft SNA Server Version 4.0 or Host Integration Server (HIS)
2000 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 about support costs, please go to the following
address on the World Wide Web:

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

NOTE: In special cases, charges that are normally incurred for support calls may
be canceled, if a Microsoft Support Professional determines that a specific
update will resolve your problem. Normal 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 for both SNA Server 4.0 and Host Integration Server 2000:

+--------------------------------+
| File name   | Date     | Time  | 
+--------------------------------+
| Db2serv.exe | 11/16/00 | 12:00 | 
+--------------------------------+

NOTE: Because of file dependencies, the most recent fix that contains the above
files may also contain additional files.



STATUS
======

Microsoft has confirmed this to be a problem in Microsoft SNA Server version 4.0
and Host Integration Server 2000.

Additional query words: db2serv memory leak oledb HIS

======================================================================
Keywords          : kbDSupport kbsna400sp3 kbhis2000 kbbuglist kbfixlist
Technology        : kbAudDeveloper kbSNAServSearch kbHostIntegServ2000 kbSNAServ400SP3
Version           : :4.0 SP3
Issue type        : kbbug
Solution Type     : kbfix

=============================================================================

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.

Copyright Microsoft Corporation 1986-2002.