visual-studio-2010 - 在sitecore中跟踪NullReferenceExceptions

Question

我正在尝试跟踪在加载任何网页时显示在sitecore 6.5上的NullReferenceException:

[NullReferenceException: Object reference not set to an instance of an object.]
   Sitecore.Diagnostics.Log.Error(String message, Exception exception, Type ownerType) +133
   Sitecore.Diagnostics.Log.Error(String message, Type ownerType) +45
   Sitecore.Configuration.Factory.LoadAutoIncludeFiles(ConfigPatcher patcher, String folder) +680
   Sitecore.Configuration.Factory.LoadAutoIncludeFiles(XmlNode element) +63
   Sitecore.Configuration.Factory.GetConfiguration() +347
   Sitecore.Diagnostics.LoggerFactory..cctor() +67

[TypeInitializationException: The type initializer for 'Sitecore.Diagnostics.LoggerFactory' threw an exception.]
   Sitecore.Diagnostics.LoggerFactory.GetLogger(Type type) +17
   Sitecore.Diagnostics.Log.Error(String message, Exception exception, Type ownerType) +93
   Sitecore.Diagnostics.Log.Error(String message, Type ownerType) +45
   Sitecore.Configuration.Factory.LoadAutoIncludeFiles(ConfigPatcher patcher, String folder) +680
   Sitecore.Configuration.Factory.LoadAutoIncludeFiles(XmlNode element) +63
   Sitecore.Configuration.Factory.GetConfiguration() +347
   Sitecore.Configuration.Factory.GetConfigNode(String xpath, Boolean assert) +82
   Sitecore.Configuration.Factory.GetConfigNode(String xpath) +29
   Sitecore.Resources.Media.UploadWatcher.InitializeIgnoreList() +114
   Sitecore.Resources.Media.UploadWatcher..cctor() +51

[TypeInitializationException: The type initializer for 'Sitecore.Resources.Media.UploadWatcher' threw an exception.]
   Sitecore.Resources.Media.UploadWatcher..ctor() +0

[TargetInvocationException: Exception has been thrown by the target of an invocation.]
   System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck) +0
   System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache) +98
   System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean skipCheckThis, Boolean fillCache) +241
   System.Activator.CreateInstance(Type type, Boolean nonPublic) +69
   System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes) +1136
   System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes) +111
   System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture) +23
   System.Web.HttpRuntime.CreateNonPublicInstance(Type type, Object[] args) +60
   System.Web.HttpApplication.BuildIntegratedModuleCollection(List`1 moduleList) +231
   System.Web.HttpApplication.GetModuleCollection(IntPtr appContext) +1365
   Microsoft.Web.Infrastructure.DynamicModuleHelper.DynamicModuleReflectionUtil.GetIntegratedModuleCollection(HttpApplication target, IntPtr appContext) +33
   Microsoft.Web.Infrastructure.DynamicModuleHelper.CriticalStatics.Init(HttpApplication context) +179
   Microsoft.Web.Infrastructure.DynamicModuleHelper.IntegratedDynamicModule.Init(HttpApplication context) +6
   System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +517
   System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +194
   System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +339
   System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +253

[HttpException (0x80004005): Exception has been thrown by the target of an invocation.]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +9087676
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +97
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +256

使该错误难以跟踪的有趣特征如下:

1)我在sitecore日志中收到以下错误:

Exception: System.InvalidOperationException
Message: 'analytics' connection string is not defined
Source: Sitecore.Kernel
   at Sitecore.Diagnostics.Assert.IsNotNull(Object value, String message)
   at Sitecore.Diagnostics.Assert.ResultNotNull[T](T result, String message)
   at Sitecore.Analytics.Data.DataAccess.DataAdapters.DataAdapterManager.ConnectionStrings.get_AnalyticsSettings()
   at Sitecore.Analytics.Data.DataAccess.DataAdapters.DataAdapterManager.ConnectionStrings.get_Analytics()
   at Sitecore.Analytics.Data.DataAccess.DataAdapters.Sql.SqlServer.SqlServerDataAdapterProvider..ctor()

但是，分析功能非常禁用:

<setting name="Analytics.DisableDatabase" value="true" />
...
<setting name="Analytics.Enabled" value="false" />

2) 当我使用Visual Studio调试，附加到IIS并击中至少一个断点时，错误消失了(如果我没有击中任何断点，则错误仍然存​​在)

3)当我做一个构建，或触摸web.config时，错误再次出现。尚未尝试重建，因为这将从网站/bin中删除重要的sitecore dll

有关我的环境的更多信息:Visual Studio 2010，IIS 7，sitecore 6.5，Windows 7

您将如何跟踪此错误？

Answer 1

在经过半天的调试和反编译之后，好了，我发现问题出在(内部)类Sitecore.Configuration.ConfigPatcher，它似乎与用于内容交付和内容创作环境的Sitecore.WebDav.config文件的xdt转换的Sitecore.WebDav.[Debug/Release].config文件有关。 。

目前，解决方法是重命名这些文件(并禁用xdt转换)

但是，此问题应影响非web.config文件的xdt转换的任何用户(我使用的是慢速猎豹加载项)