connection forcibly closed error

Can someone tell me what exactly this message means?

A transport-level error has occurred when sending the request to the server. (provider: TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host
rochestermnAsked:
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lcohanConnect With a Mentor Database AnalystCommented:
If you look under service most likely you will see your SQL Server service running under NT AUTHORITY\NETWORK SERVICE but details above won't give you the reason why SQL dropped that connection. Is this hapening often? If yes, you could use SQL Profiler to trace all sql acctivity but caution that you could bring the sql server down if you just run the defualt trace against it.
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lcohanDatabase AnalystCommented:
Most likely the (SQL) server dropped the connection - what is the service pack and what query was running on it? Sometimes MAXDOP = 1 query OPTION helps to alleviate these kind of errors in SQL along with query optimization and proper indexing.
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rochestermnAuthor Commented:
This is the version.
Microsoft SQL Server 2008 (SP2) - 10.0.4064.0 (X64)   Feb 25 2011 13:56:11   Copyright (c) 1988-2008 Microsoft Corporation  Standard Edition (64-bit) on Windows NT 6.0 <X64> (Build 6002: Service Pack 2)

Im pretty sure its a .net based web application that makes alot of connections to sql server but Im not sure where to find the exact error.  Windows event logs or sql logs.
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lcohanDatabase AnalystCommented:
You will find some details about the error in SQL but maybe not exactly what caused it and why SQL decided to term inate that process. I noticed these happening more often on SQL 2008 than previously however, SQL Server itself is no longer crashing or restarting (which is a way better thing) when a process like this may cause severe issue in SQL service otherwise.

You can use SQL SSMS to look at SQL logs under Management or on the server in the folder where SQL was installed in a path like:

Program Files\Microsoft SQL Server\MSSQL10.MSSQLSERVER\MSSQL\Log
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rochestermnAuthor Commented:
I think the answer lies in here somewhere.  Its like an invalid user account or something.

Process information:
    Process ID: 2808
    Process name: w3wp.exe
    Account name: NT AUTHORITY\NETWORK SERVICE
 
Exception information:
    Exception type: SqlException
    Exception message: A transport-level error has occurred when sending the request to the server. (provider: TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host.)
 
Request information:
    Request URL:    Request path: /Default.aspx
    User host address:     User:  
    Is authenticated: False
    Authentication Type:  
    Thread account name: NT AUTHORITY\NETWORK SERVICE
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