Question

我有非常简单的方法，有时（可能在高负荷下）它抛出非常奇怪的例外。其中一个

ROLLBACK TRANSACTION请求没有相应的BEGIN TRANSACTION
不允许启动新请求，因为它应附带有效的事务描述符
该连接不支持MultipleActiveResultSets

Bellow你可以看到方法和异常的堆栈

        using (var context1 = cp.GetNewContext())
        {
           //some work here
             await context1.SaveChangesAsync();
        }

        using (var context2 = cp.GetNewContext())
        {
            var entity = context2.Entities 
                .FirstOrDefault(e => e.ClassId == classId)
                          ?? context2.Entities.Add(new Entitity());

            entity.ClassId = classId;
            entity.Date = DateTime.UtcNow;

            context2.SaveChanges();
        }
     }

有人可以帮助我吗？我应该搜索什么？

例外

ROLLBACK TRANSACTION请求没有相应的BEGIN TRANSACTION。

System.Data.Entity.Core.EntityCommandExecutionException：执行命令定义时发生错误。有关详细信息，请参阅内部异常---＆GT; System.Data.SqlClient.SqlException：ROLLBACK TRANSACTION请求没有相应的BEGIN TRANSACTION。在System.Data.SqlClient.SqlConnection.OnError（SqlException异常，Boolean breakConnection，Action 1 wrapCloseInAction) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady) at System.Data.SqlClient.SqlDataReader.TryConsumeMetaData() 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, Int32 timeout, Task& task, Boolean asyncWrite, SqlDataReader ds) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource 1完成，Int32超时，任务和任务，布尔asyncWrite）处于System.Data.SqlClient.SqlCommand.RunExecuteReader（CommandBehavior cmdBehavior， System.Data.SentClination.Interrastructure.Interception中System.Data.SqlClient.SqlCommand.ExecuteDbDataReader（CommandBehavior behavior）的System.Data.SqlClient.SqlCommand.ExecuteReader（CommandBehavior behavior，String方法）中的RunBehavior runBehavior，Boolean returnStream，String方法） .InternalDispatcher 1.Dispatch[TTarget,TInterceptionContext,TResult](TTarget target, Func 3操作，TInterceptionContext interceptionContext，Action 3 executing, Action 3执行）在System.Data.Entity的System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.Reader（DbCommand命令，DbCommandInterceptionContext interceptionContext）。 Core.EntityClient.Internal.EntityCommandDefinition.ExecuteStoreCommands（EntityCommand entityCommand，CommandBehavior behavior）---内部异常堆栈跟踪结束---在System.Data.Entity。 System.Data.Entity.Core上的System.Data.Entity.Core.Objects.Internal.ObjectQueryExecutionPlan.Execute [TResultType]（ObjectContext context，ObjectParameterCollection parameterValues）中的Core.EntityClient.Internal.EntityCommandDefinition.ExecuteStoreCommands（EntityCommand entityCommand，CommandBehavior behavior） .Objects.ObjectContext.ExecuteInTransaction [T]（Func 1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess) at System.Data.Entity.Core.Objects.ObjectQuery 1.＆lt;＆gt; c__DisplayClass7.b__5（）在System.Data.Entity.Infrastructure.DbExecutionStrategy.Execute [TResult]（Func 1 operation) at System.Data.Entity.Core.Objects.ObjectQuery 1 .GetResults（Nullable 1 forMergeOption) at System.Data.Entity.Core.Objects.ObjectQuery 1..GetEnumerator＆gt; b__0（）at System.Data.Entity.Internal.LazyEnumerator 1.MoveNext() at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable 1 source）at System.Linq.Queryable.FirstOrDefault [TSource]（IQueryable {{ 1}} 1谓词）
不允许启动新请求，因为它应该带有有效的事务描述符

System.Data.Entity.Infrastructure.DbUpdateException：更新条目时发生错误。有关详细信息，请参阅内部异常---＆GT; System.Data.Entity.Core.UpdateException：更新条目时发生错误。有关详细信息，请参阅内部异常---＆GT; System.Data.SqlClient.SqlException：不允许启动新请求，因为它应该带有有效的事务描述符。在System.Data.SqlClient.SqlConnection.OnError（SqlException异常，布尔breakConnection，Action 1 source, Expression 1完成，Int32超时，任务和任务，布尔asyncWrite）处于System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery（TaskCompletionSource {{ 1}} 1.Dispatch [TTarget，TInterceptionContext，TResult]（TTarget target，Func 1 wrapCloseInAction) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady) 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, Int32 timeout, Task& task, Boolean asyncWrite, SqlDataReader ds) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource 3执行，Action 1 completion, String methodName, Boolean sendToPipe, Int32 timeout, Boolean asyncWrite) at System.Data.SqlClient.SqlCommand.ExecuteNonQuery() at System.Data.Entity.Infrastructure.Interception.InternalDispatcher 2 identifierValues，List 3 operation, TInterceptionContext interceptionContext, Action 1 func，IDbExecutionStrategy executionStrategy，Boolean startLocalTransaction，系统上的System.Data.Entity.Infrastructure.DbExecutionStrategy.Execute [TResult]（Func`1操作）的System.Data.Entity.Core.Objects.ObjectContext.SaveChangesToStore（SaveOptions选项，IDbExecutionStrategy executionStrategy，Boolean startLocalTransaction）中的布尔releaseConnectionOnSuccess） System.Data.Entity.Internal.InternalContext.SaveChanges（）
中的.Data.Entity.Core.Objects.ObjectContext.SaveChangesInternal（SaveOptions选项，Boolean executeInExistingTransaction）
该连接不支持MultipleActiveResultSets

System.Data.Entity.Core.EntityCommandExecutionException：执行命令定义时发生错误。有关详细信息，请参阅内部异常---＆GT; System.InvalidOperationException：连接不支持MultipleActiveResultSets。在System.Data.SqlClient.SqlCommand.b__24（任务3 executed) at System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.NonQuery(DbCommand command, DbCommandInterceptionContext interceptionContext) at System.Data.Entity.Core.Mapping.Update.Internal.DynamicUpdateCommand.Execute(Dictionary 2.InnerInvoke（）在System.Threading.Tasks.Task.Execute（）---从先前位置抛出异常的堆栈跟踪结束 - - System.Data.EntityClient.Internal.EntityCommandDefinition.d__c.MoveNext（）中System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务）的System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务） - - 内部异常堆栈跟踪的结束---在System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition.d__c.MoveNext（）---从抛出异常的上一个位置的堆栈跟踪结束---在系统位于System.Runtime.CompilerServices.TaskAwaiter 1 generatedValues) at System.Data.Entity.Core.Mapping.Update.Internal.UpdateTranslator.Update() --- End of inner exception stack trace --- at System.Data.Entity.Core.Mapping.Update.Internal.UpdateTranslator.Update() at System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[T](Func的System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务）的.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务）1. System.Data.Entity的1.GetResult（） .Core.Objects.Internal.ObjectQueryExecutionPlan.d__0 1 result) at System.Threading.Tasks.ContinuationResultTaskFromResultTask 1.GetResult（）在System。 Data.Entity.Utilities.TaskExtensions.CultureAwaiter 1.GetResult() at System.Data.Entity.Utilities.TaskExtensions.CultureAwaiter 1.MoveNext（）---从抛出异常的先前位置开始的堆栈跟踪结束---在System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务）在System.Runtime.CompilerServices.TaskAwaiter 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的System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务）处。在System.Data.Entity.Infrastructure.DbExecutionStrategy.d__9 1.GetResult() at System.Data.Entity.Core.Objects.ObjectContext.d__3d 1的GetResult（） .d__e.MoveNext（）---抛出异常的前一个位置的堆栈跟踪结束---在System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务）的System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务）处）System.Data.Entity.Internal.LazyAsyncEnumerator 1.GetResult() at System.Data.Entity.Utilities.TaskExtensions.CultureAwaiter 1.GetResult（）at System.Data.Entity.Utilities.TaskExtensions.CultureAwaiter 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.Data.Entity.Core.Objects.ObjectQuery 1.MoveNext（）---堆栈跟踪结束从抛出异常的先前位置---在System.Runtime.CompilerServices.TaskAwaiter.ThrowF System.Data.Entity.Infrastructure.IDbAsyncEnumerableExtensions.d__1a 1.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中的System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务）中的orNonSuccess（任务任务）。
的

奇怪的实体框架异常

0 个答案: