Microsoft KB Archive/890470

= FIX: A deadlock condition may occur when you call the SQLFetch function or the SQLFetchScroll function in MDAC 2.8 =

Article ID: 890470

Article Last Modified on 8/29/2007

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APPLIES TO


 * Microsoft Data Access Components 2.8

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SYMPTOMS
When you call the SQLFetch function or the SQLFetchScroll function to return a result set from Microsoft SQL Server, a deadlock condition may occur. The deadlock condition occurs when the following conditions are true:
 * You use the LOCK_TIMEOUT setting in SQL Server.
 * You set the rowset size to a value that is larger than 1.

The deadlock condition occurs more frequently when you repeatedly call the SQLFetch function or the SQLFetchScroll function.

Note This problem does not occur when you set the rowset size to a value of 1.



Hotfix information
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Prerequisites
No prerequisites are required.

Restart requirement
You must restart your computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

File 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 item in Control Panel.   Date         Time   Version         Size     File name -  03-Dec-2004  15:20  2000.85.1056.0   73,728  Dbnetlib.dll 03-Dec-2004 15:21  2000.85.1056.0   28,672  Dbnmpntw.dll 03-Dec-2004 15:20  2.80.1056.0     315,392  Msadce.dll 03-Dec-2004 15:20  2.80.1056.0     135,168  Msadco.dll 03-Dec-2004 15:20  2.80.1056.0      49,152  Msadcs.dll 03-Dec-2004 15:20  2.80.1056.0     147,456  Msadds.dll 03-Dec-2004 15:20  2.80.1056.0     512,000  Msado15.dll 03-Dec-2004 15:20  2.80.1056.0     163,840  Msadomd.dll 03-Dec-2004 15:20  2.80.1056.0     184,320  Msadox.dll 03-Dec-2004 15:20  2.80.1056.0      53,248  Msadrh15.dll 03-Dec-2004 15:20  2.80.1056.0     225,280  Msdaora.dll 03-Dec-2004 15:20  2.80.1056.0     192,512  Msdaprst.dll 03-Dec-2004 15:20  2.80.1056.0     147,456  Msdart.dll 03-Dec-2004 15:20  2.80.1056.0     303,104  Msdasql.dll 03-Dec-2004 15:21  2.575.1056.0    139,264  Msorcl32.dll 03-Dec-2004 15:20  3.525.1056.0    221,184  Odbc32.dll 03-Dec-2004 15:21  2000.85.1056.0   24,576  Odbcbcp.dll 03-Dec-2004 15:20  2.80.1056.0     442,368  Oledb32.dll 03-Dec-2004 15:20  2000.85.1056.0  503,808  Sqloledb.dll 03-Dec-2004 15:20  2000.85.1056.0  401,408  Sqlsrv32.dll 03-Dec-2004 15:08  2000.85.1056.0  208,896  Sqlxmlx.dll



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
When you call the SQLFetch function or the SQLFetchScroll function, a lock time-out error is not returned. Because a lock time-out error is not returned, your application cannot react appropriately, and the application may stop responding (hang).

For additional information, click the following article numbers to view the articles in the Microsoft Knowledge Base:

839801 FIX: Hotfixes are available for MDAC 2.8

824684 Description of the standard terminology that is used to describe Microsoft software updates

Additional query words: SQLSetStmtAttr

Keywords: kbhotfixserver kbbug kbqfe kbprb KB890470

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