Question

我们使用Entity Framework 4.0 unitofwork模式在ASP.NET MVC 3上运行应用程序。

当系统正常加载时，应用程序运行正常。我们使用jmeter（20个并发用户）模拟了一些负载。当这个运行时，我们得到了以下异常

 Error: System.Data.EntityCommandExecutionException: An error occurred while executing the command definition. See the inner exception for details. ---> System.InvalidOperationException: ExecuteReader requires an open and available Connection. The connection's current state is open.
   at System.Data.SqlClient.SqlConnection.GetOpenConnection(String method)
   at System.Data.SqlClient.SqlConnection.ValidateConnectionForExecute(String method, SqlCommand command)
   at System.Data.SqlClient.SqlCommand.ValidateCommand(String method, Boolean async)
   at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean asyncWrite)
   at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
   at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
   at System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior)
   at System.Data.Common.DbCommand.ExecuteReader(CommandBehavior behavior)
   at System.Data.EntityClient.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior)

我可以做些什么，以便在高使用率环境下没有ms sql异常？

高使用率下的实体框架数据库连接错误

0 个答案: