Is it possible to start a child that was added to a list of supervised children after the initial release was built and the running application was started?
Say, the release was built with the following application.ex:
defmodule MyApp.Application do
# See https://hexdocs.pm/elixir/Application.html
# for more information on OTP Applications
@moduledoc false
use Application
def start(_type, _args) do
# List all child processes to be supervised
children = [
# MyApp.Worker
]
# See https://hexdocs.pm/elixir/Supervisor.html
# for other strategies and supported options
opts = [strategy: :one_for_one, name: MyApp.Supervisor]
Supervisor.start_link(children, opts)
end
end
and then an upgrade was built with MyApp.Worker uncommented. In my case, after I make a hot upgrade, the uncommented MyApp.Worker is not started. What’s the easiest way to start it? Restart MyApp somehow?
Currently, I do it like this
iex(my_umbrella@127.0.0.1)3> Application.stop(:my_app)
:ok
iex(my_umbrella@127.0.0.1)4> Application.start(:my_app)
:ok
