TCP Provider, Error: 0 - An Existing Connection Was Forcibly Closed By The Remote Host

We are getting a problem when the below error Log

Server: SQL Server 2005 and SP1.



Then, All the Web Servers will drop all connections and stop the network service. Later, the network service will start up automatically but all the before service is dropped.

We would like to know the error coming from?



Error Log

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TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host



Event Type: Warning
Event Source: ASP.NET 2.0.50727.0
Event Category: Web Event
Event ID: 1309
Date: 4/29/2006
Time: 10:48:47 AM
User: N/A
Computer: 88DBWEB0
Description:
Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 4/29/2006 10:48:47 AM
Event time (UTC): 4/29/2006 2:48:47 AM
Event ID: 77910e6688484582bb1c29808feef883
Event sequence: 128
Event occurrence: 13
Event detail code: 0

Application information:
Application domain: /LM/W3SVC/24978983/Root/ph-3-127907437121075328
Trust level: Full
Application Virtual Path: /ph
Application Path: D:DB88ph
Machine name: 88DBWEB0

Process information:
Process ID: 1568
Process name: w3wp.exe
Account name: NT AUTHORITYNETWORK 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: http://88db.jobsdb.com/ph/Views/MediaUpload.aspx?PostID=50202&Type=I&panelid=postimagediv
Request path: /ph/Views/MediaUpload.aspx
User host address: 192.168.10.10
User: 50077
Is authenticated: True
Authentication Type: Forms
Thread account name: NT AUTHORITYNETWORK SERVICE

Thread information:
Thread ID: 15
Thread account name: NT AUTHORITYNETWORK SERVICE
Is impersonating: False
Stack trace: at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
at System.Data.SqlClient.TdsParserStateObject.WriteSni()
at System.Data.SqlClient.TdsParserStateObject.ExecuteFlush()
at System.Data.SqlClient.TdsParser.TdsExecuteRPC(_SqlRPC[] rpcArray, Int32 timeout, Boolean inSchema, SqlNotificationRequest notificationRequest, TdsParserStateObject stateObj)
at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
at System.Data.SqlClient.SqlCommand.ExecuteReader()
at System.Web.SessionState.SqlSessionStateStore.DoGet(HttpContext context, String id, Boolean getExclusive, Boolean& locked, TimeSpan& lockAge, Object& lockId, SessionStateActions& actionFlags)


Custom event details:

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