How to extend the Pry/Debugger timeout in Phoenix (shell process exited with reason: shutdown)

When I use IEx.pry or a breakpoint (via :int.break()), the shell dies too quickly, and I only have ~10 seconds before I lose my session:

`** (EXIT from #PID<0.606.0>) shell process exited with reason: shutdown`

And 10 seconds isn’t enough to productively debug my code in the shell/debugger. My best guess is that there’s a default timeout in a :supervisor.child_spec that I need to override, but I’m not 100% sure.

This is what I’ve tried so far (and why they haven’t worked so far):

• Increase the :timeout parameter to :infinity in the child_specs to Supervisor.start_link() in MyApp.Application.
• Updated the cowboy idle_timeout because Observer indicated that my request is a cowboy process. I don’t think it’s likely that it’s cowboy, though. If the default is 60s, I’m not even getting close to 60s.
• Instead of using IEx.pry, I tried using the debugger (via :ni.break)
• Just noting that I can’t use mix test --trace, which sets the timout to :infinity – I’m trying to debug an Endpoint action (not a test)

How do people use the debugger/IEx.pry? Are people just not encountering the 10s timeout like I am? Or is there a common configuration that I’m not using?

My application.ex in case it helps:

defmodule MyApp.Application do
  use Application

  def start(_type, _args) do
    children = [
      MyApp.Repo,
      {MyApp.Web.Endpoint, [timeout: :infinity]},
      {Phoenix.PubSub, [name: MyApp.PubSub, adapter: Phoenix.PubSub.PG2]},
      {MyApp.Middleware.Ets.AnEtsThing, [name: MyApp.Middleware.Ets.AnEtsThing, table_name: :my_app_config_2]},
    ]
    opts = [strategy: :one_for_one, name: MyApp.Supervisor]
    Supervisor.start_link(children, opts)
  end

  def config_change(changed, _new, removed) do
    MyApp.Web.Endpoint.config_change(changed, removed)
    :ok
  end
end