fix to keep alive the redirect connection when gateway tcp closes

[user20230119]

Related issues

• Azure Redirect TCP connection closes every 2 minutes #150
• Support for Azure Redirect Connection Policy db_connection#295

[mjaric]

@user20230119 , after you used this in production, did you had any issues, like zombie processes?

[user20230119]

@user20230119 , after you used this in production, did you had any issues, like zombie processes?

I have a small application in production and have not noticed any issues or down time.

How would you check for zombie processes?

If I load a page on the application, {{:proc_lib, :init_p, 5}, 465} increases by 2. When I close the browser tab, it decreases 2.

iex> Process.list() |> Enum.map(fn pid -> Process.info(pid) |> get_in([:initial_call]) end) |>  Enum.frequencies() |> Enum.sort()
[
  {{Task.Supervised, :noreply, 4}, 101},
  {{:application_master, :start_it, 4}, 29},
  {{:erl_init, :start, 2}, 1},
  {{:erlang, :apply, 2}, 11},
  {{:erts_code_purger, :start, 0}, 1},
  {{:erts_dirty_process_signal_handler, :start, 0}, 3},
  {{:erts_literal_area_collector, :start, 0}, 1},
  {{:group, :server, 4}, 1},
  {{:inet_gethost_native, :server_init, 2}, 1},
  {{:inet_tcp_dist, :accept_loop, 3}, 1},
  {{:inet_tcp_dist, :do_accept, 7}, 1},
  {{:net_kernel, :ticker, 2}, 1},
  {{:prim_file, :start, 0}, 1},
  {{:proc_lib, :init_p, 5}, 465},
  {{:socket_registry, :start, 0}, 1}
]

[vinikira]

Hey guys, any news on this? Do you have plans when this is going to be merged?