Microsoft KB Archive/320010

= 100 Percent CPU Utilization and Event ID 8 Warnings After MC_ALLOCATE Request =

Article ID: 320010

Article Last Modified on 2/22/2007

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APPLIES TO


 * Microsoft Host Integration Server 2000 Standard Edition

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This article was previously published under Q320010



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 &quot;Microsoft Host Integration Server Online Books.&quot; 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 &quot;Symptoms&quot; section of this article.



RESOLUTION
To resolve this problem, obtain the latest service pack for Host Integration Server 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

328152 How to Obtain the Latest Host Integration Server 2000 Service Pack

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.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Host Integration Server 2000 Service Pack 1.

Additional query words: his2000 spin tp

Keywords: kbbug kbenv kbfix kbhostintegserv2000presp1fix kbhostintegserv2000sp1fix KB320010

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