OWIN - “/”应用程序中的服务器错误

Question

好的，所以我有这个 MVC5 网站，使用声明身份。

OWIN 抛出这个讨厌的错误：

发生网络相关或特定于实例的错误，同时 建立与 SQL Server 的连接。找不到服务器或 无法访问。验证实例名称是否正确，并且 SQL Server 配置为允许远程连接。 （提供者：SQL 网络接口，错误：26 - 定位服务器/实例时出错 指定）

如果我手动删除 'bin' 和 'obj' 文件夹中的所有内容，网站就可以正常工作。

问题是我在部署时也会不时收到此错误。

SQL Server 很好，可以 100% 运行。 这是来自 OWIN 的其他东西，导致了这种情况。

我记得我过去遇到过这个问题，但我不记得我做了什么来解决它。

这是完整的堆栈跟踪：

[SqlException (0x80131904): 网络相关或实例特定 建立与 SQL Server 的连接时出错。这 服务器未找到或无法访问。验证实例 名称正确且 SQL Server 配置为允许远程 连接。 （提供者：SQL 网络接口，错误：26 - 错误 定位服务器/指定实例）]
System.Data.SqlClient.SqlInternalConnectionTds..ctor（DbConnectionPoolIdentity 身份、SqlConnectionString 连接选项、SqlCredential 凭证、对象 providerInfo、字符串 newPassword、SecureString newSecurePassword、布尔重定向用户实例、SqlConnectionString userConnectionOptions, SessionData reconnectSessionData, DbConnectionPool 池，字符串 accessToken，布尔值 applyTransientFaultHandling) +1385
System.Data.SqlClient.SqlConnectionFactory.CreateConnection（DbConnectionOptions 选项，DbConnectionPoolKey poolKey，对象 poolGroupProviderInfo， DbConnectionPool 池，DbConnection owningConnection， DbConnectionOptions 用户选项）+1091
System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection（DbConnectionPool 池，DbConnection owningObject，DbConnectionOptions 选项， DbConnectionPoolKey poolKey, DbConnectionOptions userOptions) +70
System.Data.ProviderBase.DbConnectionPool.CreateObject（DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal 旧连接）+981
System.Data.ProviderBase.DbConnectionPool.UserCreateRequest（DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal 旧连接）+114
System.Data.ProviderBase.DbConnectionPool.TryGetConnection（DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean 允许创建、布尔型仅OneCheckConnection、DbConnectionOptions 用户选项、DbConnectionInternal& 连接）+1590
System.Data.ProviderBase.DbConnectionPool.TryGetConnection（DbConnection owningObject，TaskCompletionSource1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) +156
System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource1 重试，DbConnectionOptions 用户选项、DbConnectionInternal oldConnection、DbConnectionInternal& 连接）+268
System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal（DbConnection 外部连接，DbConnectionFactory 连接工厂， 任务完成源1 retry, DbConnectionOptions userOptions) +314
System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource1 重试）+204
System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource1 retry) +245 System.Data.SqlClient.SqlConnection.Open() +130
System.Data.Entity.Infrastructure.Interception.InternalDispatcher1.Dispatch(TTarget 目标，Action2 operation, TInterceptionContext interceptionContext, Action3 正在执行，Action3 executed) +98
System.Data.Entity.Infrastructure.Interception.DbConnectionDispatcher.Open(DbConnection connection, DbInterceptionContext interceptionContext) +509
System.Data.Entity.SqlServer.<>c__DisplayClass33.<UsingConnection>b__32() +566 System.Data.Entity.SqlServer.<>c__DisplayClass1.<Execute>b__0() +15
System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Func1 操作）+237
System.Data.Entity.SqlServer.SqlProviderServices.UsingMasterConnection（DbConnection sqlConnection, Action1 act) +913
System.Data.Entity.SqlServer.SqlProviderServices.CreateDatabaseFromScript(Nullable1 commandTimeout, DbConnection sqlConnection, 字符串 createDatabaseScript) +117
System.Data.Entity.SqlServer.SqlProviderServices.DbCreateDatabase（DbConnection 连接, Nullable1 commandTimeout, StoreItemCollection storeItemCollection) +211
System.Data.Entity.Migrations.Utilities.DatabaseCreator.Create(DbConnection connection) +134
System.Data.Entity.Migrations.DbMigrator.EnsureDatabaseExists(Action mustSucceedToKeepDatabase) +174
System.Data.Entity.Migrations.DbMigrator.Update(String targetMigration) +116
System.Data.Entity.Internal.DatabaseCreator.CreateDatabase(InternalContext internalContext, Func3 createMigrator, ObjectContext objectContext) +121 System.Data.Entity.Database.Create(DatabaseExistenceState 存在状态) +292
System.Data.Entity.CreateDatabaseIfNotExists1.InitializeDatabase(TContext context) +187
System.Data.Entity.Internal.InternalContext.PerformInitializationAction(Action action) +71
System.Data.Entity.Internal.InternalContext.PerformDatabaseInitialization() +482 System.Data.Entity.Internal.RetryAction1.PerformAction(TInput 输入) +174
System.Data.Entity.Internal.LazyInternalContext.InitializeDatabaseAction(Action1 action) +273
System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType) +38
System.Data.Entity.Internal.Linq.InternalSet1.Initialize() +77
System.Data.Entity.Internal.Linq.InternalSet1.get_InternalContext() +21 System.Data.Entity.Internal.Linq.InternalSet1.FindAsync(CancellationToken cancelToken, Object[] keyValues) +69
System.Data.Entity.DbSet1.FindAsync(CancellationToken cancellationToken, Object[] keyValues) +46
System.Data.Entity.DbSet1.FindAsync(Object[] keyValues) +19
Microsoft.AspNet.Identity.EntityFramework.d__6c.MoveNext() +198 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务 任务）+62 Microsoft.AspNet.Identity.CultureAwaiter`1.GetResult() +48 Microsoft.AspNet.Identity.Owin.d__4.MoveNext() +828 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(任务 任务）+62
Microsoft.Owin.Security.Cookies.d__2.MoveNext() +2534 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务 任务）+62
Microsoft.Owin.Security.Infrastructure.d__0.MoveNext() +823 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(任务 任务）+62
Microsoft.Owin.Security.Infrastructure.d__0.MoveNext() +333
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务 任务）+62 Microsoft.AspNet.Identity.Owin.d__0.MoveNext() +450 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务 任务）+62 Microsoft.AspNet.Identity.Owin.d__0.MoveNext() +450 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务 任务）+62 Microsoft.AspNet.Identity.Owin.d__0.MoveNext() +450 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务 任务）+62
Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.d__5.MoveNext() +203 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(任务 任务）+62
Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.d__2.MoveNext() +193 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() +31 Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.StageAsyncResult.End(IAsyncResult a) +119
System.Web.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +365 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +134

Answer 1

您可以尝试以下...

编辑通常在 C:\Windows\System32\inetsrv\config 中找到的 ApplicationHost.config 并将 setProfileEnvironment 更改为 true。

<applicationPoolDefaults managedRuntimeVersion="v4.0">
    <processModel identityType="ApplicationPoolIdentity" loadUserProfile="true" setProfileEnvironment="true" />
</applicationPoolDefaults>

Answer 2

我发现了问题。 Startup.cs 中的这 3 行。

我已将它们注释掉，现在它可以相应地工作。

// Configure the db context, user manager and signin manager to use a single instance per request
app.CreatePerOwinContext(ApplicationDbContext.Create);
app.CreatePerOwinContext<ApplicationUserManager>(ApplicationUserManager.Create);
app.CreatePerOwinContext<ApplicationSignInManager>(ApplicationSignInManager.Create);