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我有一个应用程序最近在检索用户密码信息的操作期间MVC在我的生产服务器上开始失败。IIS 7.5在开发或我的个人计算机上使用 localhost 运行的相同应用程序IIS Server能够像往常一样与域控制器通信。我还没有重新启动生产服务器，但是下周末我们将进行服务器维护，然后我将重新启动。我希望在此之前找到原因，以防重启解决问题。我真的不知道从哪里开始进行故障排除。

编辑：2012 年 8 月 13 日问题变得间歇性，我包括代码和异常措辞

这是我用来获取用户密码信息的代码：

 public int GetPasswordExpiration(string user)
    {

        PrincipalContext ctx = new PrincipalContext(ContextType.Domain);
        UserPrincipal currLogin = UserPrincipal.FindByIdentity(ctx, user);
        DateTime passwordLastSet = currLogin.LastPasswordSet.Value;
        int doyPasswordSet = passwordLastSet.DayOfYear;
        int doy = DateTime.Today.DayOfYear;
        int daysSinceLastset = (doy - doyPasswordSet);
        int daysTilDue = (120 - daysSinceLastset);
        return (daysTilDue);

    }

这是一个例外：

未知错误 (0x80005000) 描述：在执行当前 Web 请求期间发生未处理的异常。请查看堆栈跟踪以获取有关错误及其源自代码的位置的更多信息。

异常详细信息：System.Runtime.InteropServices.COMException：未知错误 (0x80005000)

[COMException (0x80005000): Unknown error (0x80005000)]
System.DirectoryServices.DirectoryEntry.Bind(Boolean throwIfFail) +781
System.DirectoryServices.DirectoryEntry.Bind() +44
System.DirectoryServices.DirectoryEntry.get_AdsObject() +42
System.DirectoryServices.PropertyValueCollection.PopulateList() +29
System.DirectoryServices.PropertyValueCollection..ctor(DirectoryEntry entry, String
propertyName) +119
System.DirectoryServices.PropertyCollection.get_Item(String propertyName) +163
System.DirectoryServices.AccountManagement.PrincipalContext.DoLDAPDirectoryInitNoContainer() +436
System.DirectoryServices.AccountManagement.PrincipalContext.DoDomainInit() +51
System.DirectoryServices.AccountManagement.PrincipalContext.Initialize() +141
System.DirectoryServices.AccountManagement.PrincipalContext.get_QueryCtx() +42
System.DirectoryServices.AccountManagement.Principal.FindByIdentityWithTypeHelper
(PrincipalContext context, Type principalType, Nullable`1 identityType, String identityValue,
DateTime refDate) +27
System.DirectoryServices.AccountManagement.UserPrincipal.FindByIdentity(PrincipalContext
context, String identityValue) +95
ArctecLogisticsWebFiles.Utilities.CommonFunctions.GetPasswordExpiration(String user) +212
ArctecLogisticsWebFiles.Controllers.LoginDisplayController._GetFriendlyName() +585
lambda_method(Closure , ControllerBase , Object[] ) +81
System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext 
controllerContext,              IDictionary`2 parameters) +264
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext
controllerContext,     ActionDescriptor actionDescriptor, IDictionary`2 parameters) +39
System.Web.Mvc.<>c__DisplayClass15.<InvokeActionMethodWithFilters>b__12() +129
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter,
ActionExecutingContext preContext, Func`1 continuation) +826266
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext
controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters)
+314
System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String
actionName) +825488
System.Web.Mvc.Controller.ExecuteCore() +159
System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +335
System.Web.Mvc.<>c__DisplayClassb.<BeginProcessRequest>b__5() +62
System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +20
System.Web.Mvc.<>c__DisplayClasse.<EndProcessRequest>b__d() +54
System.Web.Mvc.<>c__DisplayClass4.<Wrap>b__3() +15
System.Web.Mvc.ServerExecuteHttpHandlerWrapper.Wrap(Func`1 func) +41
System.Web.HttpServerUtility.ExecuteInternal(IHttpHandler handler, TextWriter writer, 
Boolean      preserveForm, Boolean setPreviousPage, VirtualPath path, VirtualPath filePath,
String physPath,     
Exception error, String queryStringOverride) +1443
[HttpException (0x80004005): Error executing child request for
handler 'System.Web.Mvc.HttpHandlerUtil+ServerExecuteHttpHandlerAsyncWrapper'.]
System.Web.HttpServerUtility.ExecuteInternal(IHttpHandler handler, TextWriter writer,
Boolean     
System.Web.Mvc.Html.ChildActionExtensions.ActionHelper(HtmlHelper htmlHelper, String
actionName, String controllerName, RouteValueDictionary routeValues, TextWriter textWriter) +834
System.Web.Mvc.Html.ChildActionExtensions.RenderAction(HtmlHelper htmlHelper, String
actionName,   String controllerName, RouteValueDictionary routeValues) +56
ASP._Page_Views_Shared__Layout_cshtml.Execute() +1973
System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +280
System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +104
System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter
writer, WebPageRenderingBase startPage) +173
System.Web.WebPages.WebPageBase.Write(HelperResult result) +89
System.Web.WebPages.WebPageBase.RenderSurrounding(String partialViewName, Action`1 body) +234
System.Web.WebPages.WebPageBase.PopContext() +222
System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +384
System.Web.Mvc.<>c__DisplayClass1c.<InvokeActionResultWithFilters>b__19() +33
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter,  ResultExecutingContext preContext, Func`1 continuation) +825460
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult) +265
System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +825488
System.Web.Mvc.Controller.ExecuteCore() +159
System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +335
System.Web.Mvc.<>c__DisplayClassb.<BeginProcessRequest>b__5() +62
System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +20
System.Web.Mvc.<>c__DisplayClasse.<EndProcessRequest>b__d() +54
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +469
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +375
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