Microsoft KB Archive/182269

= TN3270 Incorrectly Logs Event 902 - TCPRecv Internal Error =

Article ID: 182269

Article Last Modified on 5/12/2005

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APPLIES TO


 * Microsoft SNA Server 3.0 Service Pack 4
 * Microsoft SNA Server 4.0
 * Microsoft SNA Server 3.0 Service Pack 2
 * Microsoft SNA Server 4.0

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This article was previously published under Q182269



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 version 3.0, 3.0 SP1, 3.0 SP2 and 4.0. This problem was corrected in the latest SNA Server version 3.0 and 4.0 U.S. Service Packs. For information on obtaining these Service Packs, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K



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

Keywords: kbbug kbfix KB182269

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