I keep receiving :gun_down and :gun_up error messages #15
Description
I am using exdgraph to build a little side project. It is a phoenix app inside an umbrella app. When running the phoenix server the messages :gun_down and :gun_up keep popping up in my log every couple of seconds. It seems as if the connection breaks every couple of seconds and gun then re-connects. Since I use the default settings of a pool of 5 connections and I receive 5 errors it looks like the whole pool disconnects.
When the connection is lost, Gun will send a gun_down message indicating the current protocol, the reason the connection was lost and two list of stream references.
The first list indicates open streams that may have been processed by the server. The second list indicates open streams that the server did not process.
I could also handle these messages on my side but I first want to figure out what is going on. I created a feature branch that handles the messages but doesn't solve the issue: https://github.com/ospaarmann/exdgraph/tree/fix_gun_error
[error] ExDgraph.Protocol #PID<0.280.0> received unexpected message: {:gun_down, #PID<0.288.0>, :http2, :normal, [], []}
[error] ExDgraph.Protocol #PID<0.279.0> received unexpected message: {:gun_down, #PID<0.287.0>, :http2, :normal, [], []}
[error] ExDgraph.Protocol #PID<0.278.0> received unexpected message: {:gun_down, #PID<0.286.0>, :http2, :normal, [], []}
[error] ExDgraph.Protocol #PID<0.276.0> received unexpected message: {:gun_down, #PID<0.284.0>, :http2, :normal, [], []}
[error] ExDgraph.Protocol #PID<0.277.0> received unexpected message: {:gun_down, #PID<0.285.0>, :http2, :normal, [], []}
[error] ExDgraph.Protocol #PID<0.280.0> received unexpected message: {:gun_up, #PID<0.288.0>, :http2}
[error] ExDgraph.Protocol #PID<0.279.0> received unexpected message: {:gun_up, #PID<0.287.0>, :http2}
[error] ExDgraph.Protocol #PID<0.277.0> received unexpected message: {:gun_up, #PID<0.285.0>, :http2}
[error] ExDgraph.Protocol #PID<0.276.0> received unexpected message: {:gun_up, #PID<0.284.0>, :http2}
[error] ExDgraph.Protocol #PID<0.278.0> received unexpected message: {:gun_up, #PID<0.286.0>, :http2}
[error] ExDgraph.Protocol #PID<0.280.0> received unexpected message: {:gun_down, #PID<0.288.0>, :http2, :normal, [], []}
[error] ExDgraph.Protocol #PID<0.279.0> received unexpected message: {:gun_down, #PID<0.287.0>, :http2, :normal, [], []}
[error] ExDgraph.Protocol #PID<0.276.0> received unexpected message: {:gun_down, #PID<0.284.0>, :http2, :normal, [], []}
[error] ExDgraph.Protocol #PID<0.278.0> received unexpected message: {:gun_down, #PID<0.286.0>, :http2, :normal, [], []}
[error] ExDgraph.Protocol #PID<0.277.0> received unexpected message: {:gun_down, #PID<0.285.0>, :http2, :normal, [], []}
[error] ExDgraph.Protocol #PID<0.280.0> received unexpected message: {:gun_up, #PID<0.288.0>, :http2}
[error] ExDgraph.Protocol #PID<0.278.0> received unexpected message: {:gun_up, #PID<0.286.0>, :http2}
[error] ExDgraph.Protocol #PID<0.276.0> received unexpected message: {:gun_up, #PID<0.284.0>, :http2}
[error] ExDgraph.Protocol #PID<0.279.0> received unexpected message: {:gun_up, #PID<0.287.0>, :http2}
[error] ExDgraph.Protocol #PID<0.277.0> received unexpected message: {:gun_up, #PID<0.285.0>, :http2}
Help is wanted. As of now it isn't clear where this issue comes from since I had too little time to investigate.