This channel can no longer be used to send message output session was auto-closed due to a server-initiated shutdown

@Eddiie wrote:

Hello,

I am using HAProxy to load balance a .NET / Net.TCP application.
The application works but if there is an idle of 1 minute or more, an exception is created by the caller -

This channel can no longer be used to send messages as the output session was auto-closed due to a server-initiated shutdown. Either disable auto-close by setting the DispatchRuntime.AutomaticInputSessionShutdown to false, or consider modifying the shutdown protocol with the remote server.

If we remove HAProxy from the middle, wait a minute or more between requests, this message never appears.

What is going on here? More importantly how can I stop this from happening?

It seems like the client (HAProxy in this case) is initiating the close.

frontend lt_dotnet_7078_frontend
    bind *:7078
    mode tcp
    option clitcpka
    default_backend lt_dotnet_backend

backend lt_dotnet_backend
        timeout connect 5000
        option tcp-check
        option tcplog
        option srvtcpka
        mode tcp
        balance roundrobin
        server server02_10.11.20.32_7078 10.11.20.32:7078 check port 7078 inter 200

Help is appreciated.

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