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6.8

TCP Provider: Only one usage of each socket address is normally permitted. ...error after server migration.

Asked by bbraman in SQL Server 2005, MS SQL Server, Web Languages/Standards, Active Server Pages (ASP)

Tags: SQL Server 2005, IIS 7, SQL Native Client, Classic ASP

We recently moved both our SQL Server 2005 database and Classic ASP coded website from a Windows Server 2003 to a Windows Server 2008, now calls to the database intermittently fail with the following error message:

TCP Provider: Only one usage of each socket address (protocol/network address/port) is normally permitted.

This error never occured on the old server, I suspect I've just got a setting wrong somewhere, or moving from IIS 6 to IIS 7, or from Windows Server 2003 to Windows Server 2008 has introduced this new problem.

Our traffic volume has not changed, each page on our website includes a file containing a SQL Native Client connection string in the following format just as it did on the old server:

Provider=SQLNCLI;Server=127.0.0.1,58646;Database=database99;Uid=sqluser99;Pwd=R76D2Wp99;

Using Sysinternals TCPView I sometimes see thousands of lines in a TIME_WAIT state, with both local and remote addresses beginning with 127.0.0.1.  I know I can modify the Windows registry to increase the dynamic port range, or reduce the TIME_WAIT delay value.  But I would prefer to determine the root cause of the issue.

To Recap, same Classic ASP web app connecting to SQL Server 2005 on old Windows Server 2003/II6 works fine, I move everything to Windows Server 2008/II7 and database requests intermittently return the error: TCP Provider: Only one usage of each socket address (protocol/network address/port) is normally permitted.

A good answer to this question will inform me how to prevent this error from occuring in the future without resorting to changing MaxUserPort or TCPTimedWaitDelay values in the Windows registry.

Thank you for reading my question, I appreciate it.
[+][-]07/30/09 01:59 PM, ID: 24984350Expert Comment

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[+][-]09/30/09 03:21 PM, ID: 25464223Accepted Solution

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About this solution

Zones: SQL Server 2005, MS SQL Server, Web Languages/Standards, Active Server Pages (ASP)
Tags: SQL Server 2005, IIS 7, SQL Native Client, Classic ASP
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Solution Provided By: bbraman
Participating Experts: 1
Solution Grade: A
 
 
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