当我对数据库运行查询我经常得到这个
System.Data.SqlClient.SqlException: Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.
Generated: Tue, 18 Aug 2009 08:05:39 GMT
System.Web.HttpUnhandledException: Exception of type 'System.Web.HttpUnhandledException' was thrown. ---> System.Data.SqlClient.SqlException: Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.
at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
at System.Data.SqlClient.SqlDataReader.ConsumeMetaData()
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)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result)
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()
at System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult)
at System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries)
at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query)
at System.Data.Linq.DataQuery`1.System.Collections.Generic.IEnumerable<T>.GetEnumerator()
at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
at System.Data.Linq.Provider.BindingList.Create[T](DataContext context, IEnumerable`1 sequence)
at System.Data.Linq.DataQuery`1.GetNewBindingList()
at System.Data.Linq.DataQuery`1.System.ComponentModel.IListSource.GetList()
at System.Windows.Forms.CurrencyManager.SetDataSource(Object dataSource)
at System.Windows.Forms.BindingContext.EnsureListManager(Object dataSource, String dataMember)
at System.Windows.Forms.BindingContext.get_Item(Object dataSource)
at PlexityHide.GTP.TimeItemDataConnect.Wire()
at PlexityHide.GTP.TimeItemDataConnect.UpdateDataSource(IListSource aDataSource, String aDataMember, Layer aLayer)
at PlexityHide.GTP.TimeItemDataConnect.set_DataSource(Object value)
at PlexityHide.GTP.Layer.set_DataSource(Object value)
at WebSchedule._Default.Grid_OnEachListItemWhenDataBound_GridNode(Object GTPComponent, EachListItemWhenDataBoundArgs e) in C:\MyDev\WebSchedule\Schedule.aspx.cs:line 503
at PlexityHide.GTP.Grid.NodeChangedInDS(GridNode aNode)
at PlexityHide.GTP.NodeDataConnect.UpdateRowContent(Int32 index)
at PlexityHide.GTP.NodeDataConnect.EnsureBindUpToDate()
at PlexityHide.GTP.GridNodes.get_Count()
at PlexityHide.GTP.GridStructure.get_FirstVisibleNode()
at PlexityHide.GTP.Gantt.set_TurnOffAllCollisionDetect(Boolean value)
at PlexityHide.GTP.WEB.Gantt_ASP.OnPreRender(EventArgs e)
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.BasePartialCachingControl.PreRenderRecursiveInternal()
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.Control.PreRenderRecursiveInternal()
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
--- End of inner exception stack trace ---
at System.Web.UI.Page.HandleError(Exception e)
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
at System.Web.UI.Page.ProcessRequest()
at System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context)
at System.Web.UI.Page.ProcessRequest(HttpContext context)
at ASP.schedule_aspx.ProcessRequest(HttpContext context) in c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\13c4fe72\f906a8a8\App_Web_schedule.aspx.cdcab7d2.nhap4sin.0.cs:line 0
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
它可能是由任何时候进入数据库的连接数引起的吗？有问题的页面调用甘特图并使用特定合同的计划表中的数据填充它.而且正在发生的事情是,如果说10个人正在同时拨打电话,我就会发生超时
Jon*_*eet 11
您可能有太多长时间运行的查询.另一个非常可能的原因是,一旦完成连接,您就不会关闭连接,这会将连接释放到连接池.
一般情况下,您应该尽可能晚地获取连接,并尽早发布using声明,以避免这种情况.如果你没有明确地关闭连接(即使面对异常),你也会把自己置于垃圾收集器和终结器的支配下,以便将连接返回到池中.
如果您认为您在长时间运行的查询中确实存在许多活动连接,则应增加连接池中的连接数.如果您认为实际查询本身超时(即花费的时间超过您允许的时间),那么您应该增加命令或连接的超时.