WCF内部异常消息"URI'net.tcp://..."的注册已存在."尝试通过WCF服务支持双LAN时 [英] WCF inner exception message "A registration already exists for URI 'net.tcp://....' " when trying to support a dual LAN from a WCF service

问题描述

我有一个自托管的WCF服务，该服务使用net.tcp协议作为终结点，并且在具有普通LAN卡的PC上运行良好.

I have a self-hosted WCF service which is using the net.tcp protocol for an endpoint and it works fine on a PC with a normal LAN card.

但是，我想支持具有双LAN卡的PC，这给我带来了问题.我为两张卡分配了不同的IP地址(192.168.1.1和193.168.1.1).然后，我更改了app.config文件以尝试通过使用第二个IP地址为WCF服务添加第二个终结点来支持双LAN. (我的WCF客户端可以处理选择使用两个端点地址中的哪一个.)

However, I want to support PCs which have dual LAN cards and this gives me problems. I have assigned different IP addresses to the two cards (192.168.1.1 and 193.168.1.1). I then changed my app.config file to try to support the dual LAN by adding a second endpoint for the WCF service, using the second IP address. (My WCF client can handle selecting which of the two endpoint addresses to use.)

运行服务时，出现以下错误消息:

When I run the service, I get the following error message:

"net.tcp://193.168.1.1:59301/MyClientService"中具有合同"IMyClientService"的ChannelDispatcher无法打开其IChannelListener.

The ChannelDispatcher at 'net.tcp://193.168.1.1:59301/MyClientService' with contract(s) "'IMyClientService'" is unable to open its IChannelListener.

内部异常的其他信息: URI'net.tcp://193.168.1.1:59301/MyClientService'已经存在注册.

Additional information from inner exception: A registration already exists for URI 'net.tcp://193.168.1.1:59301/MyClientService'.

注意:如果我更改了app.config文件中第二个端点上的端口号(例如，如果我使用193.168.1.1:59302)，则该服务可以正常启动.这是一种解决方法，但是如果可能的话，能够为两个LAN使用相同的端口将很有用.

Note: If I change the port # on the second endpoint in the app.config file (e.g. if i use 193.168.1.1:59302), the service starts up fine. That's a workaround, but it would be useful to be able to use the same port for both LANs, if possible.

哦，我尝试在绑定上使用portSharingEnabled(运行Net.TCP端口共享服务)，但这没有帮助.

Oh, and I tried portSharingEnabled on the binding (with the Net.TCP Port Sharing Service running) but that didn't help.

预先感谢...

我的app.config文件如下:

My app.config file looks like this:

<!-- Information about assembly binding and garbage collection -->
<runtime>
    <generatePublisherEvidence enabled="false"/>
</runtime>

<system.serviceModel>
    <services>
        <service name ="MyNamespace.MyClientService" behaviorConfiguration="MyServiceBehavior">
            <host>
                <baseAddresses>
                    <!-- Using TCP -->
                    <add baseAddress = "net.tcp://localhost:59301/MyClientService/" />
                </baseAddresses>
            </host>

            <!-- Using TCP -->
            <endpoint
                    address="net.tcp://192.168.1.1:59301/MyClientService"
                    binding="netTcpBinding"
                    bindingConfiguration="NetTcpBinding_IMyClientService"
                    contract="MyNamespace.IMyClientService"
            />

            <endpoint
                    address="net.tcp://193.168.1.1:59301/MyClientService"
                    binding="netTcpBinding"
                    bindingConfiguration="NetTcpBinding_IMyClientService"
                    contract="MyNamespace.IMyClientService"
            />


            <!-- Metadata Endpoints -->
            <!-- The Metadata Exchange endpoint is used by the service to describe itself to clients. -->
            <!-- This endpoint does not use a secure binding and should be secured or removed before deployment -->
            <endpoint
                address="mex"
                binding="mexTcpBinding"
                contract="IMetadataExchange"
            />
        </service>

    </services>

    <bindings>

        <!-- ==================================================================================== -->
        <!-- TCP/IP bindings -->

        <netTcpBinding>

            <binding name="NetTcpBinding_IMyClientService" closeTimeout="00:01:00"
                openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00"
                transactionFlow="false" transferMode="Buffered" transactionProtocol="OleTransactions"
                hostNameComparisonMode="StrongWildcard" listenBacklog="10"
                maxBufferPoolSize="524288" maxBufferSize="2147483647" maxConnections="10"
                maxReceivedMessageSize="2147483647">
                <readerQuotas maxDepth="32" maxStringContentLength="2147483647" maxArrayLength="2147483647"
                    maxBytesPerRead="4096" maxNameTableCharCount="16384" />
                <reliableSession ordered="true" inactivityTimeout="00:10:00" enabled="false" />
                <security mode="None">
                    <transport clientCredentialType="Windows" protectionLevel="EncryptAndSign" />
                    <message clientCredentialType="Windows" />
                </security>
            </binding>

        </netTcpBinding>

    </bindings>

    <behaviors>
        <serviceBehaviors>
            <behavior name="MyServiceBehavior">
                <!-- To avoid disclosing metadata information, 
                set the value below to false and remove the metadata endpoint above before deployment -->
                <!-- <serviceMetadata httpGetEnabled="True"/> -->
                <serviceMetadata/>
                <!-- To receive exception details in faults for debugging purposes, 
                set the value below to true.  Set to false before deployment 
                to avoid disclosing exception information -->
                <serviceDebug includeExceptionDetailInFaults="False" />
            </behavior>
        </serviceBehaviors>
    </behaviors>
</system.serviceModel>

推荐答案

"localhost"解析为什么?

What does "localhost" resolve to?

好像您要在"localhost"上添加一个基本地址，并添加两个附加端点，其中一个端点可能与localhost冲突.

Looks like you're adding a base address on "localhost" and two additional endpoints, one of which will probably conflict with localhost.

尝试删除基址，看看是否有区别...

Try removing the base address, see if that makes a difference...

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