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Q166845: TN3270E Service Error 503 - Session Dropped Due to Inactivity

Article: Q166845
Product(s): Microsoft SNA Server
Version(s): WINDOWS:2.11,2.11 SP1,2.11 SP2,3.0,4.0
Operating System(s): 
Keyword(s): 
Last Modified: 13-JUN-2001

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The information in this article applies to:

- Microsoft SNA Server, versions 2.11, 2.11 SP1, 2.11 SP2, 3.0, 4.0 
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SUMMARY
=======

The SNA Server TN3270 Server configuration includes an Idle Timeout parameter
which causes the server to disconnect a TN3270 client session after the session
has been inactive for the idle timeout period. The idle timeout period defaults
to 120 minutes or 2 hours.

When the Idle Timeout expires for a TN3270 client session, the TN3270 server
drops the client's SNA session and sends the following message to the TN3270
client to display to the user:

  TN3270E Service Error 503
  Session terminated due to inactivity.

When this occurs, the TN3270 Server will also report the following event to the
Windows NT Server Event Viewer Application log:

  Event ID: 603
  Source: TN3270 Server
  Description:
  TN3270(E) session with client at <client IP address and port> using
  LU <luname> terminated abnormally because:

  TN3270E Service Error 503
  Session terminated due to inactivity

NOTE: Event ID 603 can occur for a variety of reasons. Service Error 503 is a
specific cause for an abnormal session termination caused only by the TN3270
Server's idle timeout parameter.

MORE INFORMATION
================

The TN3270 Server Idle Timeout parameter can be set from 1 minute to 1440
minutes (or 1 day). Here are instructions for setting this parameter:

- If you are using SNA Server 2.11 (or 2.11 service pack 1 or 2), run the
  TN3270 Service Admin program and choose the &lt;Options&gt; button.

- If you are using SNA Server 3.0 (or 3.0 service pack 1), run the SNA Server
  Manager program, right-click on the TN3270 Server, choose the Properties
  button, and choose the Settings folder.

Additional query words:

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Keywords          :  
Technology        : kbAudDeveloper kbSNAServSearch kbSNAServ300 kbSNAServ211 kbSNAServ400 kbSNAServ211SP1 kbSNAServ211SP2
Version           : WINDOWS:2.11,2.11 SP1,2.11 SP2,3.0,4.0

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