隨機SQL連接問題。工程，然後不工作，然後工作，然後BAM！永不再工作？

Question

我在這裏使用WebMatrix，並有一個數據庫，它都工作得很好，直到它隨機向我拋出一個關於連接字符串不存在的錯誤。這種情況經常發生，我認爲這是WebMatrix中的一個錯誤，它只是在某處忘記或丟失了某個設置，因爲它與我所做的任何更改都沒有關係。

這裏的錯誤，用堆棧跟蹤一起：（道歉這麼長的誤差）

Server Error in '/' Application. 
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A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) 
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.Data.SqlClient.SqlException: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) 

Source Error: 


Line 1: @{ 
Line 2:  WebSecurity.InitializeDatabaseConnection("SV", "UserProfile", "UserId", "Email", true); 
Line 3:  WebMail.SmtpServer = "mail.sv.com"; 
Line 4:  WebMail.EnableSsl = false; 


Source File: d:\HostingSpaces\svisible\sv.com\wwwroot\_AppStart.cshtml Line: 2 

Stack Trace: 


[SqlException (0x80131904): A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)] 
    System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +5064474 
    System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning() +234 
    System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity) +341 
    System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, SqlConnection owningObject) +129 
    System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, TimeoutTimer timeout) +270 
    System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, TimeoutTimer timeout, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance) +195 
    System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) +232 
    System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection) +185 
    System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options) +33 
    System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject) +524 
    System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject) +66 
    System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) +479 
    System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +108 
    System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +126 
    System.Data.SqlClient.SqlConnection.Open() +125 
    WebMatrix.Data.Database.EnsureConnectionOpen() +44 
    WebMatrix.Data.<QueryInternal>d__0.MoveNext() +71 
    System.Linq.Enumerable.FirstOrDefault(IEnumerable`1 source) +4232308 
    WebMatrix.Data.Database.QuerySingle(String commandText, Object[] args) +103 
    WebMatrix.WebData.SimpleMembershipProvider.CheckTableExists(Database db, String tableName) +59 
    WebMatrix.WebData.SimpleMembershipProvider.CreateTablesIfNeeded() +55 
    WebMatrix.WebData.WebSecurity.InitializeMembershipProvider(SimpleMembershipProvider sMembership, DatabaseConnectionInfo connect, String userTableName, String userIdColumn, String userNameColumn, Boolean createTables) +73 
    WebMatrix.WebData.WebSecurity.InitializeProviders(DatabaseConnectionInfo connect, String userTableName, String userIdColumn, String userNameColumn, Boolean autoCreateTables) +51 
    WebMatrix.WebData.WebSecurity.InitializeDatabaseConnection(String connectionStringName, String userTableName, String userIdColumn, String userNameColumn, Boolean autoCreateTables) +51 
    ASP._Page__AppStart_cshtml.Execute() in d:\HostingSpaces\svisible\sv.com\wwwroot\_AppStart.cshtml:2 
    System.Web.WebPages.ApplicationStartPage.<ExecuteInternal>b__3() +65 
    System.Web.WebPages.ApplicationStartPage.<GetSafeExecuteStartPageThunk>b__a(Action action) +7 
    System.Web.WebPages.ApplicationStartPage.ExecuteInternal() +78 
    System.Web.WebPages.ApplicationStartPage.ExecuteStartPageInternal(HttpApplication application, Action`1 monitorFile, Func`2 fileExists, Func`2 createInstance, IEnumerable`1 supportedExtensions) +202 
    System.Web.WebPages.ApplicationStartPage.ExecuteStartPage(HttpApplication application, Action`1 monitorFile, Func`2 fileExists, Func`2 createInstance, IEnumerable`1 supportedExtensions) +41 

[HttpException (0x80004005): Exception of type 'System.Web.HttpException' was thrown.] 
    System.Web.WebPages.ApplicationStartPage.ExecuteStartPage(HttpApplication application, Action`1 monitorFile, Func`2 fileExists, Func`2 createInstance, IEnumerable`1 supportedExtensions) +88 
    System.Web.WebPages.ApplicationStartPage.ExecuteStartPage(HttpApplication application) +287 
    System.Web.WebPages.WebPageHttpModule.StartApplication(HttpApplication application, Action`1 executeStartPage, EventHandler applicationStart) +113 
    System.Web.WebPages.WebPageHttpModule.StartApplication(HttpApplication application) +71 
    System.Web.WebPages.WebPageHttpModule.Init(HttpApplication application) +217 
    System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +517 
    System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +194 
    System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +339 
    System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +253 

[HttpException (0x80004005): Exception of type 'System.Web.HttpException' was thrown.] 
    System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +9079228 
    System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +97 
    System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +256 




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Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.237 

爲什麼WebMatrix中保持這樣對我？有人可以試着幫我解決這個問題嗎？我已經無休止地搜索過，並且發現了許多有點相關的頁面，但無法使其工作。

謝謝

Answer 1

檢查並確保TCP煙囪都被Web服務器和SQL服務器上禁用。 http://technet.microsoft.com/en-us/library/gg162682(WS.10).aspx