TN3270 Incorrectly Logs Event 902 - TCPRecv Internal Error

Last reviewed: March 11, 1998
Article ID: Q182269

The information in this article applies to:

Microsoft SNA Server, versions 3.0, 3.0SP1, 3.0SP2, and 4.0

SYMPTOMS

Under certain timing conditions, the SNA Server TN3270 service may log the following event:

  Event ID:    902
  Source:      TN3270 Server
  Description: Logic error in module TCPRecv identified by:
  IOAlreadyOutstanding

  EXPLANATION
  An unexpected logic error has occurred.

  ACTION
  Record message and contact technical support.

However, this does not cause any TN3270 client connectivity problems. This event has been reproduced when the Wall Data Rumba TN3270 client is connected through the SNA Server TN3270 service configured to use an SNA Server 3270 demo link service or to an actual host application.

CAUSE

In certain timing conditions, the TN3270 service was posting a second TCP/IP receive request against a socket, while a previous receive command was already outstanding. This is a benign condition and should not be logged.

STATUS

Microsoft has confirmed this to be a problem in SNA Server 3.0 (all service packs) and SNA Server 4.0. A supported fix is now available for SNA Server 4.0, but has not been fully regression-tested and should be applied only to systems experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft recommends that you wait for the next Service Pack that contains this fix. Contact Microsoft Product Support Services for more information.

MORE INFORMATION

With this update applied, the TN3270 service no longer logs this specific error condition.

Keywords          : snatn3270
Version           : WINDOWS:3.0,3.0SP1,3.0SP2,4.0
Platform          : WINDOWS
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.

Last reviewed: March 11, 1998
© 1998 Microsoft Corporation. All rights reserved. Terms of Use.