与 TransactionScope 一起使用时，MVC 5 Identity 抛出超时异常答案

【问题标题】：MVC 5 Identity throw timeout exception when using with TransactionScope与 TransactionScope 一起使用时，MVC 5 Identity 抛出超时异常
【发布时间】：2015-04-22 11:33:02
【问题描述】：

我想使用MVC 5 Identity 成为会员。对于所有其他数据库事务，我必须使用带有TransactionScope 的 ADO.Net。在一个方法中，我需要同时使用Identity 和TransactionScope。但是如果我使用TransactionScope，Create() 方法会在大约 10 秒内抛出一个超时过期异常。有谁知道为什么？以下是上述方法的内容；

public void CreateUser(string password) {
    var userManager = new MyUserManager(new UserStore<ApplicationUser>(new ApplicationDbContext()));

    using (TransactionScope scope = new TransactionScope(TransactionScopeOption.Required, new TimeSpan(0, 30, 0)))
    {
        var company = new Company() {
            Id = Guid.NewGuid(),
            Name = "Cmp1"
        };

        AddCompany(company);

        var user = new ApplicationUser()
        {
            UserName = "Usr1",
            CompanyId = company.Id
            //... Other Properties ...
        };

        userManager.Create(user, password);  // The exception is thrown right there.
        scope.Complete();
    }
}

public void AddCompany(Company company)
{
    using (SqlConnection connection = new SqlConnection(CONN))
    {
        SqlCommand command = new SqlCommand();

        command.Connection = connection;
        command.CommandText = "INSERT INTO Companies values(@Id, @Name)";

        command.Parameters.AddWithValue("@Name", company.Name);
        command.Parameters.AddWithValue("@Id", company.Id);

        connection.Open();
        command.ExecuteNonQuery();
        connection.Close();
    }
}

exception.ToString() 输出是；

System.Data.Entity.Infrastructure.DbUpdateException: An error occurred while updating the entries. See the inner exception for details. ---> System.Data.Entity.Core.UpdateException: An error occurred while updating the entries. See the inner exception for details. ---> System.Data.SqlClient.SqlException: Timeout expired.  The timeout period elapsed prior to completion of the operation or the server is not responding. ---> System.ComponentModel.Win32Exception: The wait operation timed out
   --- End of inner exception stack trace ---
   at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
   at System.Data.SqlClient.SqlCommand.EndExecuteNonQueryInternal(IAsyncResult asyncResult)
   at System.Data.SqlClient.SqlCommand.EndExecuteNonQueryAsync(IAsyncResult asyncResult)
   at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at System.Data.Entity.Utilities.TaskExtensions.CultureAwaiter`1.GetResult()
   at System.Data.Entity.Core.Mapping.Update.Internal.DynamicUpdateCommand.<ExecuteAsync>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at System.Data.Entity.Utilities.TaskExtensions.CultureAwaiter`1.GetResult()
   at System.Data.Entity.Core.Mapping.Update.Internal.UpdateTranslator.<UpdateAsync>d__0.MoveNext()
   --- End of inner exception stack trace ---
   at System.Data.Entity.Core.Mapping.Update.Internal.UpdateTranslator.<UpdateAsync>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at System.Data.Entity.Utilities.TaskExtensions.CultureAwaiter`1.GetResult()
   at System.Data.Entity.Core.Objects.ObjectContext.<ExecuteInTransactionAsync>d__3d`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at System.Data.Entity.Utilities.TaskExtensions.CultureAwaiter`1.GetResult()
   at System.Data.Entity.Core.Objects.ObjectContext.<SaveChangesToStoreAsync>d__39.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()
   at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.<ExecuteAsyncImplementation>d__9`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at System.Data.Entity.Utilities.TaskExtensions.CultureAwaiter`1.GetResult()
   at System.Data.Entity.Core.Objects.ObjectContext.<SaveChangesInternalAsync>d__31.MoveNext()
   --- End of inner exception stack trace ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Microsoft.AspNet.Identity.TaskExtensions.CultureAwaiter`1.GetResult()
   at Microsoft.AspNet.Identity.EntityFramework.UserStore`6.<SaveChanges>d__33.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Microsoft.AspNet.Identity.TaskExtensions.CultureAwaiter.GetResult()
   at Microsoft.AspNet.Identity.EntityFramework.UserStore`6.<CreateAsync>d__c.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Microsoft.AspNet.Identity.TaskExtensions.CultureAwaiter.GetResult()
   at Microsoft.AspNet.Identity.UserManager`2.<CreateAsync>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Microsoft.AspNet.Identity.TaskExtensions.CultureAwaiter`1.GetResult()
   at Microsoft.AspNet.Identity.UserManager`2.<CreateAsync>d__d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Microsoft.AspNet.Identity.AsyncHelper.RunSync[TResult](Func`1 func)
   at Microsoft.AspNet.Identity.UserManagerExtensions.Create[TUser,TKey](UserManager`2 manager, TUser user, String password)
   at Membership.CreateUser(string password) in d:\Code\ProjectName\Membership.cs:line 114

【问题讨论】：

EF 默认情况下每个请求打开一个连接，这在事务下很糟糕。也许您遇到了 DTC 问题。发布异常 ToString() 输出。
AddCompany 到底是做什么的？
添加异常输出@usr
我认为有两个连接会死锁。死锁是分布式的。因此 SQL Server 无法检测并杀死它。确保 ASP.NET 标识使用您正在使用的相同连接。如果那是不可能的，那么您将没有合理的选择。
我知道距离上次发帖已经一个多月了，但是...在 this question 和 this answer 上，有人说在 .NET 4.5 中 TransactionScope 不是为工作而设计的使用 async/await 方法和 UserManager 类使用它。我已经使用 .NET 4.5.2 和 TransactionScope(TransactionScopeAsyncFlowOption.Enabled) 尝试了我的解决方案，并且成功了。

标签： c# asp.net-mvc asp.net-mvc-5 asp.net-identity transactionscope

【解决方案1】：

这个异常是因为无限的数据库调用......或者请使用try catch函数中的事务范围......你可以很容易地找到错误

【讨论】：