Question

我正在使用Net.tcp绑定开发WCF服务。该服务托管在辅助角色的Run方法上。

当部署到我的Azure帐户时，它可以正常工作，但在运行时它会引发异常：

无法建立连接，因为目标计算机主动拒绝它

有时当我更改端口号时，它可以正常工作几次，但是它再次拒绝连接，我必须再次更改端口号...

我在Windows防火墙中做了例外，并且还关闭了防火墙，但它不起作用。

这可能是Windows 7的一些限制吗？任何帮助赞赏。感谢

编辑：我正在添加客户端和服务器代码以便澄清。

服务配置：

using (ServiceHost host = new ServiceHost(typeof(XMPPService)))
{
    string ip = RoleEnvironment.CurrentRoleInstance.InstanceEndpoints["tcpinput"].IPEndpoint.Address.ToString();
    int tcpport = RoleEnvironment.CurrentRoleInstance.InstanceEndpoints["tcpinput"].IPEndpoint.Port;
    int mexport = RoleEnvironment.CurrentRoleInstance.InstanceEndpoints["mexinput"].IPEndpoint.Port;
    ServiceMetadataBehavior metadatabehavior = new ServiceMetadataBehavior();
    host.Description.Behaviors.Add(metadatabehavior);

    ServiceDebugBehavior behavior = host.Description.Behaviors.Find<ServiceDebugBehavior>();
    ServiceThrottlingBehavior tho = new ServiceThrottlingBehavior();
    tho.MaxConcurrentCalls = 10000;
    tho.MaxConcurrentInstances = 1000;
    tho.MaxConcurrentSessions = 1000;
    host.Description.Behaviors.Add(tho);

    if (behavior == null)
    {
        host.Description.Behaviors.Add(new ServiceDebugBehavior() { IncludeExceptionDetailInFaults = true });
    }
    else
    {
        if (!behavior.IncludeExceptionDetailInFaults)
        {
            behavior.IncludeExceptionDetailInFaults = true;
        }
    }

    Binding mexBinding = MetadataExchangeBindings.CreateMexTcpBinding();

    string mexlistenurl = string.Format("net.tcp://{0}:{1}/XMPPServiceMetaDataEndpoint", ip, mexport);
    string mexendpointurl = string.Format("net.tcp://{0}:{1}/XMPPServiceMetaDataEndpoint", ip, mexport);
    host.AddServiceEndpoint(typeof(IMetadataExchange), mexBinding, mexendpointurl, new Uri(mexlistenurl));
    NetTcpBinding tcpBinding = new NetTcpBinding(SecurityMode.None);
    tcpBinding.CloseTimeout = TimeSpan.FromMinutes(2);

    tcpBinding.ReceiveTimeout = TimeSpan.FromDays(23);
    tcpBinding.OpenTimeout = TimeSpan.FromMinutes(3);
    tcpBinding.SendTimeout = TimeSpan.FromMinutes(1);
    tcpBinding.PortSharingEnabled = true;
    tcpBinding.MaxConnections = 10000;
    tcpBinding.MaxConnections = 100;
    // tcpBinding.ListenBacklog = 1000000;
    tcpBinding.ReliableSession.InactivityTimeout = TimeSpan.FromSeconds(90);
    tcpBinding.ReliableSession.Enabled = true;

    // Add the endpoint for MyService
    string listenurl = string.Format("net.tcp://{0}:{1}/ServiceEndpoint", ip, tcpport);
    string endpointurl = string.Format("net.tcp://{0}:{1}/ServiceEndpoint", ip, tcpport);
    host.AddServiceEndpoint(typeof(IXMPPService), tcpBinding, endpointurl, new Uri(listenurl));

    host.Open();

    Thread.Sleep(Timeout.Infinite);
}

客户端：

AppService()  //private constructor
{
    client = new ServiceRef.ServiceClient();
}

服务电话：

bool isAvailable = false;

try
{
    isAvailable=client.IsAvailable(_ixo.IMBot.IMEmail, _ixo.Operator.IMClients.First().IMEmail);
}
catch
{
    if (client.InnerChannel.State == System.ServiceModel.CommunicationState.Faulted)
    {
        client.InnerChannel.Abort();
        client = new ServiceRef.ServiceClient();
    }
}

Answer 1

由于您的问题是零星的并且更改端口工作了一段时间，因此net.tcp端口共享可能与服务冲突。因此，您在本地使用基于net.tcp的WCF应用程序（在Web或辅助角色中），请确保启用net.tcp端口共享服务以便有效运行。

同样在您的服务启动代码中，您可以正确设置绑定到基本IP地址和端口，如下所示：

NetTcpBinding binding = new NetTcpBinding();
binding.PortSharingEnabled = true;
// Setup other binding properties here.

// Service_NAME is the Serice Name in this project
ServiceHost host = new ServiceHost(typeof(Service_NAME)); 

//Endpoint1 is the End point name you have setup in your Windows Azure Role property
string serviceIP = RoleEnvironment.CurrentRoleInstance.InstanceEndpoints["Endpoint1"].IPEndpoint.Address.ToString();
string servicePort = RoleEnvironment.CurrentRoleInstance.InstanceEndpoints["Endpoint1"].IPEndpoint.Port.ToString();
// 
string address = String.Format("net.tcp://{0}:{1}/SERVICE_METHOD*", serviceIP, servicePort);
host.AddServiceEndpoint(typeof(YOUR_SERVICE_TYPE), binding, address);
host.Open();

Answer 2

“我发现了正在发生的事情：分配给辅助角色的IP是动态的。有时它是127.255.0.0，其他时间是127.255.0.1”

我认为你犯了同样的错误。见这里：

Azure Compute Emulator: Is it possible to control the IP of individual instances?

WCF net.TCP自托管在azure仿真器上 - Windows 7

2 个答案: