我們的Workflow Enging所用的數據庫是安裝在流程服務器上的。今天該服務器有問題，請系統管理員重啟。重啟后發現了以下問題：
經檢查出問題的都出在和流程數據庫交互的地方。
使用SQL Server的監視器沒有發現死鎖，使用SQL Server的管理器也可以正常連接。
最后發現IIS對該服務器的連接數太多造成的。當重啟流程服務器時，IIS應用程序池一直在試圖連接該數據庫，因為連接不上所以都Hold在那兒了。將IIS的應用程序池重新回收一下后問題解決。
Server Error in '/' Application.
ExecuteReader requires an open and available Connection. The connection's current state is closed.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.InvalidOperationException: ExecuteReader requires an open and available Connection. The connection's current state is closed.
Source Error:
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Line 1: <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="PUR_Material_Query.aspx.cs" Inherits="GraceSemi.NET.Web.Pages.PUR.Common.PUR_Material_Query" %> Line 2: <%@ Register assembly="Anthem" namespace="Anthem" tagprefix="anthem" %> Line 3: <%@ Register src="../SpareParts/PUR_SparePartsMenu.ascx" tagname="PUR_SparePartsMenu" tagprefix="uc1" %> |
Source File: c:\inetpub\wwwroot\GraceSemi\Pages\PUR\Common\PUR_Material_Query.aspx Line: 1
Stack Trace:
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[InvalidOperationException: ExecuteReader requires an open and available Connection. The connection's current state is closed.] System.Data.SqlClient.SqlConnection.GetOpenConnection(String method) +6317475 System.Data.SqlClient.SqlConnection.ValidateConnectionForExecute(String method, SqlCommand command) +13 System.Data.SqlClient.SqlCommand.ValidateCommand(String method, Boolean async) +271 System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result) +138 System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) +28 System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method) +256 System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior) +19 System.Data.Common.DbCommand.System.Data.IDbCommand.ExecuteReader() +23 GraceSemi.NET.Data.Common.ConnectionHandler.ExecuteReader(Command cmd) +170 GraceSemi.NET.Data.Common.ConnectionContext.ExecuteReader(Command cmd) +82 GraceSemi.NET.Data.Common.ConnectionContext.List(Type type, Command cmd, Region region) +594 GraceSemi.NET.Data.Common.ConnectionContext.ListFirst(Type type, Command cmd) +90 GraceSemi.NET.Data.Common.ConnectionContext.ListFirst(Command cmd) +111 GraceSemi.NET.Data.Common.EntityBase.OnListFirst(IConnectinContext cc, String from, Expression expression, String orderby, String groupby) +586 GraceSemi.NET.Data.Common.EntityBase.ExOnListFirst(IConnectinContext cc, String from, Expression expression, String orderby, String groupby) +164 GraceSemi.NET.Data.Common.Expression.ListFirst(IConnectinContext cc, String orderby) +348 GraceSemi.NET.Data.Common.Expression.ListFirst(IConnectinContext cc) +131 GraceSemi.NET.Business.t_User.set_UserName(String value) +244 GraceSemi.NET.TaskPage.SSO(String UserName) +144 GraceSemi.NET.TaskPage.InitializeCulture() +3642 ASP.pages_pur_common_pur_material_query_aspx.__BuildControlTree(pages_pur_common_pur_material_query_aspx __ctrl) in c:\inetpub\wwwroot\GraceSemi\Pages\PUR\Common\PUR_Material_Query.aspx:1 ASP.pages_pur_common_pur_material_query_aspx.FrameworkInitialize() in c:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\root\3a66716a\f24c2056\App_Web_0jitdpta.3.cs:0 System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +72 System.Web.UI.Page.ProcessRequest() +119 System.Web.UI.Page.ProcessRequest(HttpContext context) +167 ASP.pages_pur_common_pur_material_query_aspx.ProcessRequest(HttpContext context) in c:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\root\3a66716a\f24c2056\App_Web_0jitdpta.3.cs:0 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +597 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +266 |