Question

我们正面临Windows服务中托管的WCF REST API的生产问题。

我们让客户每30秒向客户发出GET和PUT请求，以及对服务的常规Ping（）请求。

所有的Get，Put请求在一段时间（2或3天）内都可以正常工作，并且在以后的某个时刻不再提供任何WEB-API请求。我们不得不再次重新启动Windows服务，以使REST服务恢复到工作状态。

客户端错误消息：状态代码为503服务不可用。

可以通过以下方案在本地开发环境中重现该问题。

在每2秒发出一次Ping请求和每4秒发出一次Put请求后，在示例测试客户端的帮助下，模拟连续的REST本地服务调用，我们能够在发出68个Put请求和152 Get后在5分钟内重现该问题要求。没有错误登录服务。状态代码为503服务不可用。

这是WCF REST服务的服务器配置。

WCF REST服务配置：

var restURL = string.Format("{0}{1}/v{2}", (isHttps ? WsSprotocol : WsProtocol), Config.Server, Config.Version);
            var webServiceHost = new WebServiceHost(typeof(EngageWebServiceHostREST), new Uri(restURL));

        var webHttpBinding = new WebHttpBinding
        {
            Security = new WebHttpSecurity { Mode = isHttps ? WebHttpSecurityMode.Transport : WebHttpSecurityMode.None },
            MaxReceivedMessageSize = int.MaxValue,
            ReaderQuotas = { MaxArrayLength = int.MaxValue },
            OpenTimeout = new TimeSpan(0, 01, 00),
            CloseTimeout = new TimeSpan(0, 10, 00),
            SendTimeout = new TimeSpan(0, 10, 00),
            CrossDomainScriptAccessEnabled = true,
            TransferMode = TransferMode.StreamedResponse
        };

        if (isHttps)
        {
            bindHttpCertificate(webServiceHost);

            if (webServiceHost.Credentials.ServiceCertificate != null && webServiceHost.Credentials.ServiceCertificate.Certificate != null)
            {
                webHttpBinding.Security.Transport.ClientCredentialType = HttpClientCredentialType.Certificate;
                Log.Info(string.Format("Https Certificate {0} binded to {1}", webServiceHost.Credentials.ServiceCertificate.Certificate.SubjectName.Name, restURL));
            }
        }

        var customBinding = new CustomBinding(webHttpBinding);

        for (int counter = 0; counter < customBinding.Elements.Count; counter++)
        {
            if (customBinding.Elements[counter] is WebMessageEncodingBindingElement)
            {
                WebMessageEncodingBindingElement webBE = (WebMessageEncodingBindingElement)customBinding.Elements[counter];
                customBinding.Elements[counter] = new GZipMessageEncodingBindingElement(webBE);
            }
            else if (customBinding.Elements[counter] is TransportBindingElement)
            {
                ((TransportBindingElement)customBinding.Elements[counter]).MaxReceivedMessageSize = int.MaxValue;
            }
        }

        ServiceEndpoint endpoint = webServiceHost.AddServiceEndpoint(typeof(IEngageWebServiceREST), customBinding, "");

        endpoint.Behaviors.Add(new WebHttpBehavior() { AutomaticFormatSelectionEnabled = true, DefaultOutgoingResponseFormat = WebMessageFormat.Json });
        endpoint.Behaviors.Add(new EnableCrossOriginResourceSharingBehavior());
        endpoint.Behaviors.Add(new HelpPageEndPointBehavior("Product Suite"));

        var serviceDebugBehaviorLocal = webServiceHost.Description.Behaviors.Find<ServiceDebugBehavior>();
        if (serviceDebugBehaviorLocal == null)
        {
            webServiceHost.Description.Behaviors.Add(new ServiceDebugBehavior
            {
                IncludeExceptionDetailInFaults = true
            });
        }
        else
        {
            if (!serviceDebugBehaviorLocal.IncludeExceptionDetailInFaults)
                serviceDebugBehaviorLocal.IncludeExceptionDetailInFaults = true;

        }

等待并欣赏解决问题的想法和想法。

谢谢

Dileep

Answer 1

我建议您参考以下配置。

<system.serviceModel>
    <services>
      <service behaviorConfiguration="Service1Behavior" name="VM1.MyService">
        <endpoint address="" binding="webHttpBinding" contract="VM1.IService" behaviorConfiguration="rest" bindingConfiguration="mybinding" >
        </endpoint>
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
      </service>
    </services>
    <bindings>
      <webHttpBinding>
        <binding name="mybinding" maxBufferPoolSize="2147483647" maxReceivedMessageSize="2147483647" maxBufferSize="2147483647" sendTimeout="00:10:00" receiveTimeout="00:10:00">
          <readerQuotas maxDepth="2147483647" maxStringContentLength="2147483647" maxArrayLength="2147483647" maxBytesPerRead="2147483647" />
          <security mode="Transport">
            <transport clientCredentialType="None"></transport>
          </security>
        </binding>
      </webHttpBinding>
    </bindings>
    <behaviors>
      <serviceBehaviors>
        <behavior name="Service1Behavior">
          <serviceMetadata httpGetEnabled="true"/>
          <serviceDebug includeExceptionDetailInFaults="False"/>
        </behavior>
      </serviceBehaviors>
      <endpointBehaviors>
        <behavior name="rest">
          <webHttp/>
          <dataContractSerializer maxItemsInObjectGraph="2147483647"/>
        </behavior>
      </endpointBehaviors>
    </behaviors>
  </system.serviceModel>

请随时让我知道问题是否仍然存在。

WCF ServiceHost REST API会在一段时间后变为空闲状态，并返回超时错误

WCF REST服务配置：

1 个答案: