Question

我遇到繁忙的wcf服务问题，客户端可以通过该服务连接并使用它。下面是服务器配置和类属性的错误和堆栈跟踪。

错误消息和堆栈跟踪：

The HTTP service located at https://my.web.service.com/Service/Service.svc is unavailable.  This could be because the service is too busy or because no endpoint was found listening at the specified address. Please ensure that the address is correct and try accessing the service again later.ExST: 
Server stack trace: 
   at System.ServiceModel.Channels.HttpChannelUtilities.ProcessGetResponseWebException(WebException webException, HttpWebRequest request, HttpAbortReason abortReason)
   at System.ServiceModel.Channels.HttpChannelFactory`1.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
   at System.ServiceModel.Channels.RequestChannel.Request(Message message, TimeSpan timeout)
   at System.ServiceModel.Channels.SecurityChannelFactory`1.SecurityRequestChannel.Request(Message message, TimeSpan timeout)
   at System.ServiceModel.Security.SecuritySessionSecurityTokenProvider.DoOperation(SecuritySessionOperation operation, EndpointAddress target, Uri via, SecurityToken currentToken, TimeSpan timeout)
   at System.ServiceModel.Security.SecuritySessionSecurityTokenProvider.GetTokenCore(TimeSpan timeout)
   at System.IdentityModel.Selectors.SecurityTokenProvider.GetToken(TimeSpan timeout)
   at System.ServiceModel.Security.SecuritySessionClientSettings`1.ClientSecuritySessionChannel.OnOpen(TimeSpan timeout)
   at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.OnOpen(TimeSpan timeout)
   at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.CallOpenOnce.System.ServiceModel.Channels.ServiceChannel.ICallOnce.Call(ServiceChannel channel, TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.CallOnceManager.CallOnce(TimeSpan timeout, CallOnceManager cascade)
   at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
   at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Web服务器配置：

<?xml version="1.0"?>
<configuration>
  <configSections>
    <sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
      <section name="Server.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false"/>
      <section name="ServerEdi.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false"/>
    </sectionGroup>
  </configSections>

  <system.web>
    <httpRuntime maxRequestLength="65536"/>
    <customErrors mode="Off"/>
    <compilation targetFramework="4.5"/>
    <pages controlRenderingCompatibilityVersion="4.0"/>
  </system.web>

  <system.serviceModel>

    <bindings>
      <wsHttpBinding>
        <binding name="IWebService" closeTimeout="01:00:00" openTimeout="01:00:00" receiveTimeout="01:00:00" sendTimeout="01:00:00" allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" maxBufferPoolSize="2147483647" maxReceivedMessageSize="2147483647" messageEncoding="Text" textEncoding="utf-8" useDefaultWebProxy="true">
          <readerQuotas maxDepth="2147483647" maxStringContentLength="2147483647" maxArrayLength="2147483647" maxBytesPerRead="2147483647" maxNameTableCharCount="2147483647"/>
          <security mode="TransportWithMessageCredential">
            <transport clientCredentialType="None" proxyCredentialType="None" realm=""/>
            <message clientCredentialType="UserName" negotiateServiceCredential="true"/>
          </security>
        </binding>
      </wsHttpBinding>
    </bindings>

    <services>
      <service behaviorConfiguration="nowa" name="ServiceWeb.WebService">
        <endpoint address="" binding="wsHttpBinding" bindingConfiguration="IWebService"
          contract="ServiceWeb.IWebService" />
      </service>
    </services>

    <behaviors>
      <serviceBehaviors>
        <behavior name="nowa">
          <serviceMetadata httpsGetEnabled="true"/>
          <serviceCredentials>
            <serviceCertificate findValue="xxxyyyzzz.com" storeLocation="LocalMachine" x509FindType="FindBySubjectName"/>
            <userNameAuthentication userNamePasswordValidationMode="Custom" customUserNamePasswordValidatorType="ServiceWeb.MyCustomUserNamePasswordValidator,ServiceWeb"/>
            <windowsAuthentication includeWindowsGroups="false" allowAnonymousLogons="false"/>
          </serviceCredentials>
          <serviceAuthorization impersonateCallerForAllOperations="false"/>
          <dataContractSerializer maxItemsInObjectGraph="2147483647"/>
          <serviceDebug includeExceptionDetailInFaults="true"/>
          <serviceThrottling maxConcurrentCalls="500" maxConcurrentInstances="500" maxConcurrentSessions="500" />

        </behavior>

      </serviceBehaviors>
    </behaviors>
    <serviceHostingEnvironment multipleSiteBindingsEnabled="true"/>
  </system.serviceModel>

  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
  </startup>

  <system.webServer>
    <urlCompression doStaticCompression="false"/>
  </system.webServer>

</configuration>

类属性：

[ServiceBehavior(InstanceContextMode = InstanceContextMode.Single)]
   //[ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall, ConcurrencyMode = ConcurrencyMode.Single)]
  //  [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall,
   //              ConcurrencyMode = ConcurrencyMode.Multiple)]
    public class WebService : IWebService {}

如果有人可以提供帮助，我将不胜感激stackoverflow上描述的情况不完全适合并解决我的情况。目前该服务使用了大约50个客户。当我调用一个返回某个东西的方法并且你不能异步调用它时会出现问题，因为答案必须立即传递。

Answer 1

WCF有一些默认的限制值，所以你可能会遇到这些值，请参阅：http://blogs.msdn.com/b/wenlong/archive/2009/07/26/wcf-4-higher-default-throttling-settings-for-wcf-services.aspx

通常，当客户端没有关闭连接时会出现此错误，连接会在超时之前打开，阻止任何新呼叫。

WCF Web服务太忙了

1 个答案: