'Why am I getting an exception (TCP error code 10061) when attempting to communicate between 2 applications using WCF?

I am trying to use WCF to setup IPC between 2 running windows applications. I want to start out by saying that I know there are other (better?) ways to implement this solution. But, due to some pre-existing design considerations/constraints, I'm bound to using: - netTcpBinding - DuplexChannelFactory<> to support bidirectional communication

All the applications, services, etc reside on the same machine as we will be installing everything on a single dedicated piece hardware running MS Windows.

So the schematic kind of looks like this WPFApp1 (Contains ReportingFacilityInterface definition) Returns notifications as separate callbacks to WPFApp2 ^ | | V ReportingFacilityInterfaceProxy ^ | | V WPFApp2 (needs to call exposed methods on WPF1 ReportingFacilityInterface object)

I've created my WCF "service" class and contracts. I'm using a proxy dll to facilitate the communication.

Here's the sequence of events:

1)WPFApp1 starts up and instantiates an instance of the exposed service class

ReportingFacilityInterface = new ReportingFacility.ReportingFacilityInterface();

This starts up fine.

2) WPFApp2 startsup and initializes instance of proxy object

reportingFacilityProxy = new ReportingFacilityInterfaceProxy.ReportingFacilityProxy();

This instantiates the proxy object, which results in this getting called:

reportingFacilityInterface = DuplexChannelFactory<IReportingFacilityInterface>.CreateChannel(objContext, "RPIEndPointConfiguration");

This seems to run and return successfuly.

3) WPFApp2 calls a on the object (through the proxy) 

 reportingFacilityInterface.Initialize(configuration);

I get an exception with the following detail:

Could not connect to net.tcp://localhost:8732/ReportingFacility. The connection attempt lasted for a time span of 00:00:02.1931255. TCP error code 10061: No connection could be made because the target machine actively refused it 127.0.0.1:8732

I examined my current port usage using the CurrPorts application and noticed that port #8732 does is not in the list of currently active/used ports on my machine.

Since I'm pretty green @ the world of WCF, I'm kind of stumped here. As I mentioned above, all these are running on the same (dedicated) piece of Windows 7 hardware, so permissions/roles should not be an issue. I think I'm pretty close here, but am just missing something.

Thanks, JohnB

c++sharp.netwcfipc


Solution 1:[1]

I'd:

  1. Verify your server config to be sure about service endpoint address
  2. Run the Service Trace Viewer Tool (SvcTraceViewer.exe)
  3. Add some basicHttpBinding endpoint to be sure you can access it from your browser

Solution 2:[2]

I resolved the same issue by going to services and start Net.tcp listener adapter.

Also, you can find more solutions here http://blogs.ajithbhat.com/2010/06/tcp-error-code-10061-no-connection.html

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 evgenyl
Solution 2 user229044

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