WCF sending the same exception even if the service endpoint address is valid

问题

I'm running into a really strange problem with WCF. I need to implement some recovery behavior for WCF service if not reachable endpoint IP address received or service can not bind. The flow is simple if the application fail on exception on service creation it terminate it and request from user another IP address and perform another attempt to create the service. (The code snippet below). If the address is not valid I get "A TCP error (10049: The requested address is not valid in its context) occurred while listening on IP Endpoint=.121.10.11.11" exception, but for any reason if I try the second attempt with valid address I've got the same exception with wrong IP address from previous attempt. Here is a code:

ServiceHost service = null;
try
{
    Uri[] uris = { new Uri(Constants.PROTOCOL + "://" + address + ":" + port) };
    service = new ServiceHost(typeof(IRemoteService), uris);
    NetTcpBinding tcpBinding =
        WcfTcpRemoteServicesManager.LessLimitedNewNetTcpBinding(int.MaxValue,
            int.MaxValue, int.MaxValue);
    ServiceEndpoint ep = service.AddServiceEndpoint(implementedContract.FullName,
        tcpBinding, serviceName);
    var throttle =
        service.Description.Behaviors.Find<ServiceThrottlingBehavior>();
    if (throttle == null)
    {
        throttle = new ServiceThrottlingBehavior
        {
            MaxConcurrentCalls = Constants.MAX_CONCURRENT_CALLS,
            MaxConcurrentSessions = Constants.MAX_CONCURRENT_SESSIONS,
            MaxConcurrentInstances = Constants.MAX_CONCURRENT_INSTANCES
        };
        service.Description.Behaviors.Add(throttle);
    }
    service.Open();

}
catch (Exception e)
{
    _debugLog.WriteLineMessage(
        "Failed to open or create service exception. Exception message:" +
            e.Message);
    if (service!=null)
    {
        try
        {
            service.Close();
        }
        catch (Exception)
        {
            service.Abort();
            service.Close();
            throw e;
        }
    }
}

Thanks

回答1:

You catch exception e, then later you catch a different exception, but you throw the original exception e.

Not sure if this is your problem, but it could result in you getting a confusing exception back.

EDIT

Now I have read it a bit more carefully.

The problem is a mismatch between the context and the address. I see that the code uses netTcpBinding:

Check that the address matches, what is the value of CONSTANTS.Protocol?
Check that there is no conflict in the configuration files.

来源：https://stackoverflow.com/questions/2112457/wcf-sending-the-same-exception-even-if-the-service-endpoint-address-is-valid

标签

wcf

service

endpoint