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A transport-level error has occurred when receiving results from the server. (provider: TCP Provider, error: 0 - The semaphore timeout period has expired.)   at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
   at System.Data.SqlClient.TdsParserStateObject.ReadSniError(TdsParserStateObject stateObj, UInt32 error)
   at System.Data.SqlClient.TdsParserStateObject.ReadSni(DbAsyncResult asyncResult, TdsParserStateObject stateObj)
   at System.Data.SqlClient.TdsParserStateObject.ReadNetworkPacket()
   at System.Data.SqlClient.TdsParserStateObject.ReadBuffer()
   at System.Data.SqlClient.TdsParserStateObject.ReadByte()
   at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
   at System.Data.SqlClient.SqlDataReader.ConsumeMetaData()
   at System.Data.SqlClient.SqlDataReader.get_MetaData()
   at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
   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(CommandBehavior behavior)
   at Microsoft.SharePoint.Utilities.SqlSession.ExecuteReader(SqlCommand command, CommandBehavior behavior)
   at Microsoft.SharePoint.Administration.SPPersistedChildCollection`1.InitializeFromDatabase()
   at Microsoft.SharePoint.Administration.SPPersistedObjectCollection`1.get_BackingList()
   at Microsoft.SharePoint.Administration.SPPersistedObjectCollection`1.GetEnumerator()
   at Microsoft.SharePoint.Administration.SPAlternateUrlCollectionManager.LookupAlternateUrl(Uri canonicalRequestUri)
   at Microsoft.SharePoint.Administration.SPAlternateUrlCollectionManager.RebaseUriWithAlternateUri(Uri requestUri, Nullable`1 desiredZone)
   at Microsoft.SharePoint.Administration.SPAlternateUrlCollectionManager.RebaseUriWithAlternateUri(Uri requestUri)
   at Microsoft.SharePoint.Utilities.SPUtility.AlternateServerUrlFromHttpRequestUrl(Uri url)
   at Microsoft.SharePoint.Administration.SPAlternateUrl.get_ContextUri()
   at Microsoft.SharePoint.WebControls.SPControl.SPWebEnsureSPControl(HttpContext context)
   at Microsoft.SharePoint.WebControls.SPControl.GetContextWeb(HttpContext context)
   at Microsoft.SharePoint.ApplicationRuntime.BaseApplication.Application_PreRequestHandlerExecute(Object sender, EventArgs e)
   at Microsoft.SharePoint.ApplicationRuntime.SPRequestModule.PreRequestExecuteAppHandler(Object oSender, EventArgs ea)
   at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

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