2013-05-13 32 views
0

在MVC 4应用程序中使用.NET 4,LINQtoSQL我刚开始遇到大量请求失败的问题。这些请求似乎无法从数据库中进行非常简单的选择。大约一个星期没有更新服务器或代码库,但这个问题只在今天上午开始。
该异常随机抛出(看似),并且可能发生在所有页面上。
事件查看器日志显示以下堆栈跟踪:Frequent TransactionException for simple query

Exception information: 
    Exception type: TransactionException 
    Exception message: The operation is not valid for the state of the transaction. 
    at System.Transactions.TransactionState.EnlistPromotableSinglePhase(InternalTransaction tx, IPromotableSinglePhaseNotification promotableSinglePhaseNotification, Transaction atomicTransaction) 
    at System.Transactions.Transaction.EnlistPromotableSinglePhase(IPromotableSinglePhaseNotification promotableSinglePhaseNotification) 
    at System.Data.SqlClient.SqlInternalConnection.EnlistNonNull(Transaction tx) 
    at System.Data.ProviderBase.DbConnectionInternal.ActivateConnection(Transaction transaction) 
    at System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) 
    at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) 
    at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) 
    at System.Data.SqlClient.SqlConnection.Open() 
    at System.Data.Linq.SqlClient.SqlConnectionManager.UseConnection(IConnectionUser user) 
    at System.Data.Linq.SqlClient.SqlProvider.get_IsSqlCe() 
    at System.Data.Linq.SqlClient.SqlProvider.InitializeProviderMode() 
    at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query) 
    at System.Data.Linq.Table`1.System.Linq.IQueryProvider.Execute[TResult](Expression expression) 
    at System.Linq.Queryable.SingleOrDefault[TSource](IQueryable`1 source, Expression`1 predicate) 
    at MYPROJECT.Services.Concrete.SettingsService.GetString(Settings settingID, String defaultValue) in c:\TeamCity\buildAgent\work\123456789\MYPROJECT.Services\Concrete\SettingsService.cs:line 40 
    at MYPROJECT.Controllers.BaseController.OnActionExecuted(ActionExecutedContext filterContext) in c:\TeamCity\buildAgent\work\123456789\MYPROJECT\Controllers\BaseController.cs:line 37 
    at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass4f.<InvokeActionMethodFilterAsynchronously>b__49() 
    at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass37.<BeginInvokeActionMethodWithFilters>b__36(IAsyncResult asyncResult) 
    at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass25.<>c__DisplayClass2a.<BeginInvokeAction>b__20() 
    at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass25.<BeginInvokeAction>b__22(IAsyncResult asyncResult) 
    at System.Web.Mvc.Controller.<>c__DisplayClass1d.<BeginExecuteCore>b__18(IAsyncResult asyncResult) 
    at System.Web.Mvc.Async.AsyncResultWrapper.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) 
    at System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) 
    at System.Web.Mvc.Async.AsyncResultWrapper.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) 
    at System.Web.Mvc.MvcHandler.<>c__DisplayClass8.<BeginProcessRequest>b__3(IAsyncResult asyncResult) 
    at System.Web.Mvc.Async.AsyncResultWrapper.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) 
    at System.Web.Mvc.HttpHandlerUtil.ServerExecuteHttpHandlerWrapper.<>c__DisplayClass4.<Wrap>b__3() 
    at System.Web.Mvc.HttpHandlerUtil.ServerExecuteHttpHandlerWrapper.Wrap[TResult](Func`1 func) 
    at System.Web.HttpServerUtility.ExecuteInternal(IHttpHandler handler, TextWriter writer, Boolean preserveForm, Boolean setPreviousPage, VirtualPath path, VirtualPath filePath, String physPath, Exception error, String queryStringOverride) 

中间的方法,它是我的代码基本上是返回此:

dc.Settings.SingleOrDefault(x => x.SettingID == settingID) 

从谷歌搜索我读过检查数据库连接并确保MSDTC正在运行。这是,但这导致我检查服务器上的时间。 SQL和Web服务器之间的差异大约是5秒。所以我认为这可能是相关的,但在与域控制器重新同步后,我仍然有这个问题!任何帮助将非常感激。

更新更多的信息
什么可值得一提的是,我使用NInject。所以在DataContext被像这样处理:

Bind<IUnitOfWork>().To<UnitOfWork>().InRequestScope().WithConstructorArgument("connectionString", connectionString); 

我的服务,那么一切都能够引用相同数据的上下文。

回答

0

狩猎是一场疯狂的追逐。问题出在代码上。一个ChangeConflictException发生,然后后续请求仍在同一个数据上下文中执行。我不知道如何,但只要发生这种情况,就会使一些请求在最简单的数据库调用中完全失败(如上所示)。拿出违规代码完全解决了这个问题。