DOCUMENT:Q320010  22-MAY-2002  [sna]
TITLE   :100 % CPU Utilization and Event ID 8 Warnings After MC_ALLOCATE
PRODUCT :Microsoft SNA Server
PROD/VER::
OPER/SYS:
KEYWORDS:kbenv kbtool

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

 - Microsoft Host Integration Server 2000 
-------------------------------------------------------------------------------

SYMPTOMS
========

An APPC transaction program may cause Host Integration Server 2000 to log
multiple Event ID 8 messages and cause CPU utilization to reach 100 percent.

Details of the Event ID 8
-------------------------

Event Type:	Warning
Event Source:	SNA Server
Event Category:	None
Event ID:	8
Description:
(1174) Internal Protocol Violation
 
 EXPLANATION
 A protocol violation has occurred at the interface between the SNA 
 Service and another SNA component (for example, the emulator or link 
 service).
 
 SUBCODE INFORMATION
 X'1105'  Insufficient space to copy data into node buffer.
 X'1112'  Received unknown message type at the node interface.
 X'1144'  Received illegal message at the node interface.
 X'1151'  Received unrecognized message from the link service component.
 X'1174'  Received invalid session limits message from Host Integration 
          Server SNA Manager.
 X'1175'  Received invalid CNOS command.
 X'1188'  Received invalid CNMS message.
 
 ACTION
 Provide network support personnel with the event log file(s) related to
 SNA, SNA trace file(s), and the number and description of the displayed 
 subcode. For information about SNA log and trace files, see the 
 "Microsoft Host Integration Server Online Books."

When this problem occurs, you must stop and restart the SNA Server service.

CAUSE
=====

This problem occurs if the following conditions exist:

 - An APPC mode has been configured with an automatic activation limit, and an
   explicit partnership has been defined.

 - An invoking APPC transaction program issues an MC_ALLOCATE request by using
   the FQPLU_NAME (fully-qualified partner LU name) field instead of the
   PLU_ALIAS (partner LU alias) field. However the string that the transaction
   program specifies in the FQPLU_NAME field actually represents the partner LU
   alias instead of the fully-qualified partner LU name.

When the APPC transaction program issues an MC_ALLOCATE request under these
conditions, the SNA Server service enters an internal loop. This looping causes
the service to generate the symptoms that are listed in the "Symptoms" section
of this article.

RESOLUTION
==========

To resolve this problem, correct the APPC transaction program by using one of
the following methods:

 - Change the invoking APPC transaction program so that it uses the PLU_ALIAS
   field of the MC_ALLOCATE instead of the FQPLU_NAME field.

 - Change the invoking APPC transaction program so that it specifies a
   fully-qualified partner LU name in the FQPLU_NAME field instead of specifying
   a partner LU alias.

Additional query words: his2000 spin tp

======================================================================
Keywords          : kbenv kbtool 
Technology        : kbAudDeveloper kbHostIntegServ2000
Version           : :
Issue type        : kbprb

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

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 2002.