Question

我正在使用SL 4和带有PollingDuplexHttpBinding的.net-4 WCF服务。从服务调用服务并调用客户端工作正常。但是，只要我在不等待异步回答的情况下调用该服务15次，就会在获得0,1或2个成功答案后收到TargetInvocationException。

我的服务属性是：

[ServiceBehavior(InstanceContextMode = InstanceContextMode.Single,
    ConcurrencyMode = ConcurrencyMode.Multiple)]

这是在我的web.config中：

<behaviors>
  <serviceBehaviors>
    <behavior name="RecordProviderServiceBehavior">
      <serviceMetadata httpGetEnabled="true" />
      <serviceDebug includeExceptionDetailInFaults="false" />
      <dataContractSerializer maxItemsInObjectGraph="2147483647" />
      <serviceTimeouts transactionTimeout="05:05:00" />
      <serviceThrottling maxConcurrentCalls="500" maxConcurrentSessions="500"
       maxConcurrentInstances="2147483647" />
    </behavior>
    <behavior name="">
      <serviceMetadata httpGetEnabled="true" />
      <serviceDebug includeExceptionDetailInFaults="false" />
    </behavior>
  </serviceBehaviors>
</behaviors>
<serviceHostingEnvironment multipleSiteBindingsEnabled="true"/>
<bindings>
  <pollingDuplexHttpBinding>
    <binding name="multipleMessagesPerPollPollingDuplexHttpBinding"
       maxBufferSize="2147483647" maxBufferPoolSize="2147483647" maxReceivedMessageSize="2147483647"
       maxOutputDelay="00:00:00.200" duplexMode="MultipleMessagesPerPoll" />
  </pollingDuplexHttpBinding>
</bindings>

就像这样，我在客户端实例化服务：

var binding = new PollingDuplexHttpBinding(PollingDuplexMode.MultipleMessagesPerPoll)
                          {
                              MaxBufferSize = 2147483647,
                              MaxReceivedMessageSize = 2147483647
                          };
        _service = new ServiceClient(new InstanceContext(this),
                                            binding,
                                            new EndpointAddress("path to .svc"));

因为我是WCF的新手：我错过了什么吗？

Answer 1

TargetInvocationException应该有一个包含实际异常的InnerException属性，它可能会给你一些线索。

Answer 2

不，它没有提供任何线索。远程服务器返回错误Not Found。

对异步的调用已完成，但它永远不会进入服务器，并且会立即收到回调中的错误

多个WCF服务调用上的TargetInvocationException

2 个答案: