Article ID: 834905 - View products that this article applies to.
NoticeThis hotfix is available as part of a cumulative hotfix package. When you receive this hotfix from Microsoft Product Support Services, the article number that is listed in the hotfix package will be 839801 for MDAC 2.8 or 836799 for MDAC 2.7 SP1. For more information, see the following article in the Microsoft Knowledge Base:
839801MDAC 2.7 SP1
(http://support.microsoft.com/kb/839801/ )FIX: Hotfixes are available for MDAC 2.8
(http://support.microsoft.com/kb/836799/ )FIX: Hotfixes are available for MDAC 2.7 Service Pack 1
You connect to an Oracle database by using the Microsoft OLE DB Provider for Oracle (MSDAORA), and then you end the connection on the server side. When you open a new connection to the Oracle database from your application, you receive the following exception error message:
System.Data.OleDb.OleDbException: Unspecified error
ORA-01012: not logged on
When you end the connection to the Oracle database on the server side while using MSDAORA, the broken connection is returned to the connection pool. The connection pooling code incorrectly interacts with the ResetConnection property of MSDAORA. When this property is not supported by the provider, the pooling code incorrectly interprets that the connection is reset, and that the connection is a valid one. When the client code opens a new connection, the broken connection that was returned to the connection pool may be retrieved. Therefore, you receive the error message that is mentioned in the "Symptoms" section.
Hotfix informationA supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only 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 Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
File informationThe 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.
Microsoft Data Access Components (MDAC) 2.8
Date Time Version Size File name --------------------------------------------------------- 10-Mar-2004 04:22 2.80.1036.0 225,280 Msdaora.dll 10-Mar-2004 04:22 2000.85.1036.0 24,576 Odbcbcp.dll 10-Mar-2004 04:21 2.80.1036.0 442,368 Oledb32.dll 10-Mar-2004 04:21 2000.85.1036.0 401,408 Sqlsrv32.dll
MDAC 2.7 Service Pack 1
Date Time Version Size File name --------------------------------------------------------- 10-Mar-2004 02:19 2000.81.9046.0 61,440 Dbnetlib.dll 10-Mar-2004 02:20 2.71.9046.0 221,184 Msdaora.dll 10-Mar-2004 02:15 2.71.9046.0 126,976 Msdart.dll 10-Mar-2004 02:15 3.520.9046.0 204,800 Odbc32.dll 10-Mar-2004 02:20 2000.81.9046.0 24,576 Odbcbcp.dll 10-Mar-2004 02:20 3.520.9046.0 98,304 Odbccp32.dll 10-Mar-2004 02:16 2.71.9046.0 417,792 Oledb32.dll 10-Mar-2004 02:19 2000.81.9046.0 471,040 Sqloledb.dll 10-Mar-2004 02:19 2000.81.9046.0 385,024 Sqlsrv32.dll
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Steps to reproduce the behavior
For more information about the Microsoft OLE DB Provider for Oracle, visit the following Microsoft Developer Network (MSDN) Web site:
http://msdn2.microsoft.com/en-us/library/ms810685.aspxFor additional information, click the following article number to view the article in the Microsoft Knowledge Base:
824684The 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.
(http://support.microsoft.com/kb/824684/ )Description of the standard terminology that is used to describe Microsoft software updates
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