Article ID: 829921
Article Last Modified on 10/26/2005
APPLIES TO
- Microsoft Host Integration Server 2000 Standard Edition
- Microsoft Host Integration Server 2000 Service Pack 1
- 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
- Microsoft SNA Server 4.0 Service Pack 4
SYMPTOMS
Microsoft SNA Server applications that are configured to use single sign-on (SSO) may experience delays when connecting to IBM mainframe computers or to AS/400-based computers. When a delay occurs, users may notice that a transaction that was initiated by an application takes noticeably longer to complete. If the application is configured with a timeout, users may notice that the transaction is canceled because of the long delay in processing the SSO request.
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.
CAUSE
The SNA Server host security DLL file, Snasii.dll, calls the ReleaseSemaphore() function to signal the pool of worker threads when a new SSO account lookup is added to an internal memory queue. However, the function that calls ReleaseSemaphore() does not check the return code to determine whether the ReleaseSemaphore() call completed successfully.
If ReleaseSemaphore() is unsuccessful, the worker threads that process the SSO account lookup requests are not signalled. Because not all the worker threads are used, processing the SSO account lookup requests is slower. This results in response times that are unusually slow for the SNA application.
RESOLUTION
This section provides fixes for the following applications:
- Microsoft SNA Server 4.0
- Microsoft Host Integration Server 2000
Microsoft SNA Server 4.0
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.
To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Date Time Version Size File name
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01-Oct-2003 23:59 4.0.0.608 16,176 Nthstreg.dll
01-Oct-2003 23:59 4.0.0.608 45,248 Sec400.dll
01-Oct-2003 23:59 4.0.0.608 32,608 Snahsmsg.dll
02-Oct-2003 00:00 4.0.0.608 149,280 Snapwchg.dll
01-Oct-2003 23:59 4.0.0.608 138,848 Snarpc.dll
02-Oct-2003 00:00 4.0.0.608 44,800 Snasii.dll
02-Oct-2003 00:00 4.0.0.608 15,280 Udsuppnt.dll
01-Oct-2003 23:59 4.0.0.608 88,736 Hostproc.exe
02-Oct-2003 00:00 4.0.0.608 136,272 Snapmp.exe
02-Oct-2003 00:00 4.0.0.608 323,984 Snaudb.exe
02-Oct-2003 00:00 4.0.0.608 54,736 Udconfig.exe
Note Because of file dependencies, the most recent fix that contains the preceding files may also contain additional files.
[[#HIS|]]Microsoft Host Integration Server 2000
Service pack information
To resolve this problem, obtain the latest service pack for Microsoft Host Integration Server 2000. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
328152 How to obtain the latest service pack for Host Integration Server 2000
Hotfix information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Date Time Version Size File name
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31-Oct-2003 21:47 5.0.0.948 119,056 Hsdbrepl.dll
31-Oct-2003 21:47 5.0.0.948 155,920 Snapwchg.dll
31-Oct-2003 21:47 5.0.0.948 147,728 Snarpc.dll
31-Oct-2003 21:47 5.0.0.948 53,520 Snasii.dll
31-Oct-2003 21:47 5.0.0.948 147,728 Snapmp.exe
31-Oct-2003 21:47 5.0.0.948 360,720 Snaudb.exe
31-Oct-2003 21:47 5.0.0.948 127,248 Udbmgmt.exe
31-Oct-2003 21:47 5.0.0.948 57,616 Udconfig.exe
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 the Microsoft products that are listed in the "Applies to" section.
This problem was corrected in Microsoft Host Integration Server 2000 Service Pack 2.
Keywords: kbbug kbfix kbqfe kbhotfixserver KB829921
