Microsoft KB Archive/885445

= FIX: A computer that is running a .NET Framework 1.1 application experiences high CPU utilization when the application tries to connect to SQL Server 2000 by using the System.Data.SqlClient.SqlConnection.Open method =

Article ID: 885445

Article Last Modified on 12/3/2007

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APPLIES TO


 * Microsoft .NET Framework 1.1 Service Pack 1

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SYMPTOMS
A Microsoft .NET Framework 1.1 application tries to connect to a computer that is running Microsoft SQL Server 2000 by using the System.Data.SqlClient.SqlConnection.Open method. When this behavior occurs, the computer that is running the .NET Framework 1.1 application may experience high CPU utilization and the computer may stop responding. A single thread will consume most of the CPU cycles because the thread is stuck in an infinite loop.

This problem occurs when the following conditions are true:
 * The application uses many concurrent SqlConnection.Open method requests.
 * The application encounters errors on some of the SqlConnection.Open method calls.



CAUSE
This problem occurs because under high stress conditions, a failing connection open call does not raise an event. This behavior causes the SqlConnection.Open method call to be stuck in an infinite loop.



Software update information
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 Microsoft .NET Framework 1.1 service pack that contains this hotfix.

To resolve this problem immediately, 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:

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

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.

Prerequisites
The .NET Framework 1.1 SP1

File information
The English version of this software update 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 -  13-Oct-2004  02:19  1.1.4322.2033    102,400  Setregni.exe 29-Nov-2004 23:53  1.1.4322.2048  1,298,432  System.data.dll 19-Sep-2004 05:48  1.1.4322.573     118,784  Togac.exe



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

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

Keywords: kbqfe kbhotfixserver kbbug kbfix KB885445

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