【茶包射手專欄】Reporting Service rsExecutionNotFound

User回報Reporting Service檢視報表時，遇到以下錯誤:
找不到執行 'stdeve2cn35pg5bhmblygy45' (rsExecutionNotFound) 
Execution 'stdeve2cn35pg5bhmblygy45' cannot be found(rsExecutionNotFound)

同一時間，其他機器檢視同一報表一切正常，問題只出現在特定機器上。檢視Reporting Service Log(Log位於C:\Program Files\Microsoft SQL Server\MSSQL.3\Reporting Services\LogFiles)，發現以下Exception:
w3wp!session!1!2007/11/26-09:00:16:: i INFO: LoadSnapshot: Item with session: stdeve2cn35pg5bhmblygy45, reportPath: , userName: DomainName\AccountName not found in the database
w3wp!library!1!2007/11/26-09:00:16:: e ERROR: Throwing Microsoft.ReportingServices.Diagnostics.Utilities.ExecutionNotFoundException: 找不到執行 'stdeve2cn35pg5bhmblygy45', ;
 Info: Microsoft.ReportingServices.Diagnostics.Utilities.ExecutionNotFoundException: 找不到執行 'stdeve2cn35pg5bhmblygy45'
w3wp!library!1!2007/11/26-09:00:16:: Unhandled exception was caught: Microsoft.Reporting.WebForms.ReportServerException: 找不到執行 'stdeve2cn35pg5bhmblygy45' (rsExecutionNotFound)
   at Microsoft.Reporting.WebForms.ServerReport.GetExecutionInfo()
   at Microsoft.Reporting.WebForms.ServerReport.SetExecutionId(String executionId, Boolean fullReportLoad)
   at Microsoft.Reporting.WebForms.ReportDataOperation..ctor()
   at Microsoft.Reporting.WebForms.HttpHandler.GetHandler()
   at Microsoft.Reporting.WebForms.HttpHandler.ProcessRequest(HttpContext context)
   at System.Web.HttpApplication.CallHandlerExecutionStep.
System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Google結果，看來與Session找不到或過期有關。進一步追查，確認有問題的IE在上週開啟後即未關閉，今天繼續使用，此一狀況符合Session過期的條件，推測就是導致錯誤原因，此時將IE關閉重新開啟即一切正常，Case Closed!