FIX: ODBCCR32 Deadlock Occurs When You Use MFC and NT Critical Sections (818493)
The information in this article applies to:
- Microsoft Data Access Components 2.7 SP1
SYMPTOMSIf you use the MFC (Microsoft Foundation Classes) ODBC wrapper classes (for example, CDatabase and CRecordset) on one thread, and you use straight ODBC API calls on another thread in the same process, a deadlock may occur.RESOLUTION
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may 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 immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone 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 fix 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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18-Apr-2003 23:28 3.520.9031.42 204,800 Odbc32.dll
21-Apr-2003 23:11 6.0.2800.1106 194,048 Q818493_mdac27_x86.exe
WORKAROUNDTo work around this problem, do not use the ODBC cursor library in your code. To avoid loading the ODBC cursor library when you use the MFC ODBC CDatabase class, pass false for the bUseCursorLib parameter when you call CDatabase::Open.STATUSMicrosoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section of this article.
| Modification Type: | Major | Last Reviewed: | 4/7/2006 |
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| Keywords: | kbQFE KBHotfixServer kbfix kbBug KB818493 kbAudDeveloper |
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