无法启动服务结构服务

Question

在学习 Azure Service Fabric 编程中关于创建计算器服务的 WcfCommunicationClient 的教程时，我偶然发现了一个我找不到答案的问题。

代码与书中大致相同，服务（WCF）是这样创建的：

    protected override IEnumerable<ServiceInstanceListener> CreateServiceInstanceListeners()
{
  return new[]
  {
    new ServiceInstanceListener(initParams => new WcfCommunicationListener<ICalculatorService>(initParams, this, WcfUtility.CreateTcpListenerBinding(), "ServiceEndpoint"))
  };
}

第一次调用服务时，调用永远挂起，服务结构浏览器给出以下错误+堆栈跟踪：

不健康事件：SourceId='System.RA'、Property='ReplicaOpenStatus'、 HealthState='警告'，考虑WarningAsError=false。副本有 打开期间多次失败。错误 =System.InvalidOperationException (-2146233079) Poging om contracttype voor ICalculatorService te verkrijgen, maar dat type is geen ServiceContract en neemt ook geen ServiceContract 结束。比杰 System.ServiceModel.Description.ServiceReflector.GetContractTypeAndAttribute（类型 interfaceType, ServiceContractAttribute&contractAttribute) bij System.ServiceModel.Description.TypeLoader.LoadContractDescriptionHelper（类型 contractType, Type serviceType, Object serviceImplementation) bij System.ServiceModel.Description.ContractDescription.GetContract（类型 合同类型）bij Microsoft.ServiceFabric.Services.Communication.Wcf.Runtime.WcfCommunicationListener1.CreateServiceEndpoint(Type contractType, Binding binding, EndpointAddress address) bij Microsoft.ServiceFabric.Services.Communication.Wcf.Runtime.WcfCommunicationListener1..ctor(ServiceContext serviceContext，TServiceContract wcfServiceObject，绑定 listenerBinding, EndpointAddress 地址, String endpointResourceName) 比杰 Microsoft.ServiceFabric.Services.Communication.Wcf.Runtime.WcfCommunicationListener`1..ctor(ServiceContext serviceContext，TServiceContract wcfServiceObject，绑定 listenerBinding, String endpointResourceName) bij CalculatorService.CalculatorService.b__3_0(StatelessServiceContext initParams) 在 C:\Users\servel\documents\visual studio 2015\Projects\CalculatorApplication\CalculatorService\CalculatorService.cs:regel 45 比杰 Microsoft.ServiceFabric.Services.Runtime.StatelessServiceInstanceAdapter.d__10.MoveNext() 比杰 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务 任务）bij System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务 任务）bij Microsoft.ServiceFabric.Services.Runtime.StatelessServiceInstanceAdapter.d__0.MoveNext()

显然服务无法启动。那么如何解决这个问题呢？

Answer 1

确保您的服务实现具有 WCF ServiceContract 和 OperationContract 属性的接口。比如这个例子here。