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https://issues.apache.org/jira/browse/DISPATCH-1878?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17260613#comment-17260613
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Charles E. Rolke commented on DISPATCH-1878:
--------------------------------------------

The issue here is that nc immediately closes the incoming tcp connection after 
transferring the message. Before the router can initiate the tunnel from the 
tcp listener to the tcp connector the transfer path is torn down.

A trace of the router activity is attached in file dispatch-1878-trace.html. 
The nc connection is _[C2]_ and starts at 2021-01-07 11:01:27.406889

 

> Client app not getting a response through tcpListener
> -----------------------------------------------------
>
>                 Key: DISPATCH-1878
>                 URL: https://issues.apache.org/jira/browse/DISPATCH-1878
>             Project: Qpid Dispatch
>          Issue Type: Bug
>          Components: Protocol Adaptors
>    Affects Versions: 2.0.0
>            Reporter: Fernando Giorgetti
>            Priority: Major
>         Attachments: dispatch-1878-trace.html
>
>
> I have a tcp-echo server running locally through:
> podman run -d --rm --name tcpecho -p 9090:9090 quay.io/skupper/tcp-go-echo
> And I have a router configured with a tcpConnector to localhost at port 9090 
> and a tcpListener at port 9999.
> I am able to use nc (netcat) to send data to the tcp-echo directly (port 
> 9090) or through
> the router (port 9999), if I run "nc 127.0.0.1 9999" and the send the data.
> But if I run it as:  "echo abcd | nc 127.0.0.1 9999" I am not seeing a 
> response, but if 
> I use port 9090 (original port) instead of 9999 (router tcpListener), then I 
> get the
> response correctly.



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