如何防止应用程序超时过期异常？

Question

请帮助从下面的 Stack Strace 中找出异常的原因：

Error=Timeout expired.  The timeout period elapsed prior to completion of the operation or the server is not responding., 

StackTrace = at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, 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.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)
   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.InternalExecuteNonQuery(TaskCompletionSource`1 completion, String methodName, Boolean sendToPipe, Int32 timeout, Boolean asyncWrite)
   at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
   at Core.ResService.DataAccess.SQLHelper.ExecuteNonQuery(SqlConnection conn, SqlTransaction trans, CommandType cmdType, String cmdText, SqlParameter[] cmdParms)
   at Core.ResService.DataAccess.ReservationDal.SelectActiveResXml(Int32 resvID, String sessionID)
   at Core.ResService.BusinessLogic.Reservation.SelectActiveReservation(Int32 hotelID, Int32 resvID, String sessionID) 

关于上述异常堆栈strace的任何想法，如可能的解决方案和原因都将被理解。

Answer 1

它会在堆栈跟踪中告诉您。 您的 SQL 调用超时。 修复 SQL 调用或增加超时。 命令对象上有一个超时属性，但您应该真正修复您的 SQL。