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Q162665: LUA File Transfer Locks Out 3270 User Sessions

Article: Q162665
Product(s): Microsoft SNA Server
Version(s): WINDOWS:2.0,2.1,2.11,3.0
Operating System(s): 
Keyword(s): kbbuglist
Last Modified: 12-JUN-2001

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The information in this article applies to:

- Microsoft SNA Server, versions 2.0, 2.1, 2.11, 3.0 
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SYMPTOMS
========

When invoking a file transfer using the Data Connection NetView/DM Agent (NDMA)
on a computer running SNA Server, all 3270 client user requests "hang" until the
file transfer has completed. When running a 3270 emulator on the server, a 3270
request does get processed, but the response time is very slow.

CAUSE
=====

The Data Connection NetView/DM Agent uses the LUA RUI API to communicate with
the host. Even though the LUA LU being used was defined as a "low priority LU"
(that is, the "high priority LU" checkbox on the LUA LU definition within SNA
Server Admin is not checked), SNA Server was queuing the LUA application
requests in a high-priority internal queue, ahead of 3270 user requests. All
user requests made on 3270 LU sessions are always defined as "high priority,"
though they were not being properly handled as high priority.


RESOLUTION
==========

A fix is available to correct this problem.


STATUS
======

Microsoft has confirmed this to be a problem in SNA Server versions 2.0, 2.1,
2.11, 2.11 Service Pack 1 (SP1), and 3.0.


A supported fix is now available for SNA Server versions 2.11 and 3.0, 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 Technical Support for more
information.


Additional query words: prodsna 2.00 2.10 2.11 3.00 kbbug2.00 sna3sp1fix

======================================================================
Keywords          :  kbbuglist
Technology        : kbAudDeveloper kbSNAServSearch kbSNAServ300 kbSNAServ200 kbSNAServ211 kbSNAServ210
Version           : WINDOWS:2.0,2.1,2.11,3.0

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