WCF服务Net TCP套接字连接将在15分钟后中止，并且始终与绑定配置无关

Question

我有一个WCF服务（不通过IIS托管），并且我有另一个应用程序通过网络TCP与我的WCF通信。除了可以长时间运行的操作之外，其他所有功能都非常有效。我的WCF可能执行诸如运行查询或备份数据库之类的任务。这些任务可能需要几分钟或几小时才能完成。也不能选择异步执行这些任务。

问题：在15分钟处，套接字连接被中止，我似乎无法弄清楚这是从哪里来的...

这是WCF服务的配置：

<system.serviceModel>
<bindings>
    <netTcpBinding>
        <binding name="NetTcpBindingConfigurationForMyWCF"
                 openTimeout="24:00:00"
                 closeTimeout="24:00:00"
                 sendTimeout="24:00:00"
                 receiveTimeout="24:00:00"
                 maxReceivedMessageSize="9223372036854775807"
                 transferMode="Streamed">
            <readerQuotas maxDepth="2147483647" maxStringContentLength="2147483647" />
        </binding>
    </netTcpBinding>
</bindings>

<services>
    <service name="Namespace.MyWCF">
        <endpoint address=""
                  binding="netTcpBinding"
                  bindingConfiguration="NetTcpBindingConfigurationForMyWCF"
                  name="NetTcpBindingEndpointMyWCF"
                  contract="MyWCF.IMyWCF" />
        <endpoint address="mex" 
                  binding="mexTcpBinding" 
                  bindingConfiguration="" 
                  name="MexTcpBindingEndpoint" 
                  contract="IMetadataExchange" />
        <host>
            <baseAddresses>
                <add baseAddress="net.tcp://SQLServer/MyWCF" />
            </baseAddresses>
        </host>
    </service>
</services>
<behaviors>
    <serviceBehaviors>
        <behavior name="">
            <dataContractSerializer maxItemsInObjectGraph="2147483646"/>
            <serviceThrottling maxConcurrentCalls="1000" maxConcurrentInstances="1000" maxConcurrentSessions="1000"/>
            <serviceMetadata httpGetEnabled="false" httpsGetEnabled="false" />
            <serviceDebug includeExceptionDetailInFaults="true" />
        </behavior>
    </serviceBehaviors>
</behaviors>

这是我的应用程序的配置：

<system.serviceModel>
<bindings>
    <netTcpBinding>
        <binding name="NetTcpBindingConfigurationForMyWCF"
                 openTimeout="24:00:00"
                 closeTimeout="24:00:00"
                 sendTimeout="24:00:00"
                 receiveTimeout="24:00:00"
                 maxReceivedMessageSize="9223372036854775807"
                 transferMode="Streamed">
            <readerQuotas maxDepth="2147483647" maxStringContentLength="2147483647" />
        </binding>
    </netTcpBinding>
</bindings>
<client>
    <endpoint address="net.tcp://SQLServer/MyWCF"
              binding="netTcpBinding"
              bindingConfiguration="NetTcpBindingConfigurationForMyWCF"
              contract="MyWCF.IMyWCF"
              name="NetTcpBindingEndpointMyWCF">
    </endpoint>
</client>

这是我到目前为止拼命尝试的尝试，没有任何运气：-将所有超时值设置为24小时-为serviceThrottling添加了配置，为maxConcurrentCalls，maxConcurrentInstances和maxConcurrentSessions设置了较大的值-两台服务器上禁用了防火墙-启用nettcpbinding端口共享-使用inactivityTimeout = 24h启用了可靠的会话

无论我尝试什么，我都会在15分钟后不断收到以下错误：

Exception msg: An existing connection was forcibly closed by the remote host
Exception type: System.Net.Sockets.SocketException
Stack trace:    at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
   at System.ServiceModel.Channels.SocketConnection.ReadCore(Byte[] buffer, Int32 offset, Int32 size, TimeSpan timeout, Boolean closing)


Exception msg: The socket connection was aborted. This could be caused by an error processing your message or a receive timeout being exceeded by the remote host, or an underlying network resource issue. Local socket timeout was '23.23:59:59.9843758'.
Exception type: System.ServiceModel.CommunicationException
Stack trace:    at System.ServiceModel.Channels.SocketConnection.ReadCore(Byte[] buffer, Int32 offset, Int32 size, TimeSpan timeout, Boolean closing)
   at System.ServiceModel.Channels.SocketConnection.Read(Byte[] buffer, Int32 offset, Int32 size, TimeSpan timeout)
   at System.ServiceModel.Channels.DelegatingConnection.Read(Byte[] buffer, Int32 offset, Int32 size, TimeSpan timeout)
   at System.ServiceModel.Channels.ConnectionStream.Read(Byte[] buffer, Int32 offset, Int32 count)
   at System.Net.FixedSizeReader.ReadPacket(Byte[] buffer, Int32 offset, Int32 count)
   at System.Net.Security.NegotiateStream.StartFrameHeader(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.NegotiateStream.ProcessRead(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest)

Answer 1

我最终找到了此超时的根本原因，并在其他人遇到相同问题的情况下回答我自己的问题。

我们服务器之间的所有通信都通过防火墙。我们使用SonicWall，它具有TCP非活动超时配置...默认值为15分钟，这是我的超时时间所在。

我最终实现了一种基于句柄的机制来进行长时间运行的操作。我的调用应用程序将请求一个操作并收到一个句柄作为回报。然后，应用程序可以使用句柄通过定期调用WCF来获取操作状态的更新，直到操作完成。

问题已解决！