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我正在使用 ServiceModelEx 的服务总线部分。（并使用 AppFabric 自动启动 WCF 服务）。我有一些奇怪的行为......

基本上，当我第一次调用服务总线时，所有正确的事件都会沿着链触发（通过查看数据库并查看记录的值来验证）。

但是在随后的调用中，没有任何反应。就好像事件永远不会发生......

.svclogs 没有显示任何有用的信息，事实上，它们甚至没有注册后续事件。

但是，对于订阅到总线的每个服务，Windows 事件日志确实显示以下错误：

WebHost failed to process a request.
 Sender Information: System.ServiceModel.ServiceHostingEnvironment+HostingManager/777031
 Exception: System.ServiceModel.ServiceActivationException: The service '/AcmeWidgets.WidgetFactory.Subscribers.WidgetBuilder/BuildService.svc' cannot be activated due to an exception during compilation.  The exception message is: The type 'AcmeWidgets.WidgetFactory.Subscribers.WidgetBuilder.BuildService', provided as the Service attribute value in the ServiceHost directive, or provided in the configuration element system.serviceModel/serviceHostingEnvironment/serviceActivations could not be found.. ---> System.InvalidOperationException: The type 'AcmeWidgets.WidgetFactory.Subscribers.WidgetBuilder.BuildService', provided as the Service attribute value in the ServiceHost directive, or provided in the configuration element system.serviceModel/serviceHostingEnvironment/serviceActivations could not be found.
   at System.ServiceModel.Activation.ServiceHostFactory.CreateServiceHost(String constructorString, Uri[] baseAddresses)
   at System.ServiceModel.ServiceHostingEnvironment.HostingManager.CreateService(String normalizedVirtualPath)
   at System.ServiceModel.ServiceHostingEnvironment.HostingManager.ActivateService(String normalizedVirtualPath)
   at System.ServiceModel.ServiceHostingEnvironment.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath)
   --- End of inner exception stack trace ---
   at System.ServiceModel.ServiceHostingEnvironment.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath)
   at System.ServiceModel.ServiceHostingEnvironment.EnsureServiceAvailableFast(String relativeVirtualPath)
 Process Name: w3wp
 Process ID: 3052

我知道服务属性值是正确的，显然是因为它第一次运行正确。

有任何想法吗？？？

编辑 1：要添加到这种奇怪的行为，如果我在 Visual Studio 中“重建”解决方案，第一次调用总线工作，所有事件链下触发，然后所有后续调用再次失败

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1 回答 1

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您在此处显示堆栈跟踪的代码路径并非特定于服务总线。这是一个激活错误。在我看来，这里好像存在类型加载错误。我会尝试先使用 fuslogvw 来看看

于 2012-05-23T08:28:43.893 回答