Microsoft KB Archive/276068

= SNA Server Traps When Sending &quot;Session Deactivated Event&quot; =

Article ID: 276068

Article Last Modified on 12/29/2003

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APPLIES TO


 * Microsoft SNA Server 4.0
 * Microsoft SNA Server 3.0 Service Pack 2
 * Microsoft SNA Server 3.0 Service Pack 3
 * Microsoft SNA Server 3.0 Service Pack 4
 * Microsoft SNA Server 4.0
 * Microsoft SNA Server 4.0 Service Pack 1
 * Microsoft SNA Server 4.0 Service Pack 2
 * Microsoft SNA Server 4.0 Service Pack 3

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This article was previously published under Q276068



SYMPTOMS
The SNA Server service may experience an Access Violation (AV) in the S1PCSGO function while trying to send an unsolicited status update to SNA Server Manager to report a session deactivated event. If Drwtsn32.exe is configured as the default debugger on the SNA Server system, the Drwtsn32.log file will be updated with information similar to the following:

Application exception occurred:

App: [path]snaservr.exe (pid=[process ID #])

When: [date] @ [time]

Exception number: c0000005 (access violation)

[...]

function: s1pcsgo



CAUSE
There is a small timing window where the SNA Server service may try to send a status update for a resource after the resource has been deleted from the SNA Server configuration. When this occurs, the SNA Server service ends up referencing a null internal record that causes the specified Access Violation.



RESOLUTION
To resolve this problem, obtain the latest service pack for SNA Server 4.0. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

215838 How to Obtain the Latest SNA Server Version 4.0 Service Pack

The English version of this fix should have the following file attributes or later:

NOTE: Because of file dependencies, the most recent fix that contains the preceding files may also contain additional files.



STATUS
Microsoft has confirmed that this is a problem in SNA Server versions 3.0 (all SP), 4.0, 4.0 SP1, 4.0 SP2, and 4.0 SP3.

This problem was first corrected in SNA Server 4.0 Service Pack 4.



MORE INFORMATION
The SNA Server service has been updated to verify that a resource is valid before it reports status for the resource. This update will prevent this type of Access Violation from occurring in the future.

Additional query words: sp1 sp2 sp3

Keywords: kbbug kbfix kbsna400presp4fix kbqfe kbsna400sp4fix KB276068

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