Elixir 1.10, mix release start is stalling before cowboy can listen, WSL

Questions / Help
1

I’m running WSL on Windows 10, and cannot run :observer (although I think there may be a way now).

I just installed, using asdf:

Erlang/OTP 21 [erts-10.2.4] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1] [hipe]
Elixir 1.10.0-dev (495148e) (compiled with Erlang/OTP 20),

and then ran

MIX_ENV=prod mix phx.server

runs the app and works just fine:

warning: :simple_one_for_one strategy is deprecated, please use DynamicSupervisor instead
  (elixir) lib/supervisor.ex:613: Supervisor.init/2
  (elixir) lib/supervisor.ex:565: Supervisor.start_link/2
  (phoenix) lib/phoenix/socket/pool_supervisor.ex:31: Phoenix.Socket.PoolSupervisor.start_pooled/3
  (stdlib) supervisor.erl:379: :supervisor.do_start_child_i/3
  (stdlib) supervisor.erl:365: :supervisor.do_start_child/2
// ... warning repeated for multiple db connections to Google cloud_sql_proxy
12:40:05.775 [info] Running GjwappWeb.Endpoint with cowboy 2.6.3 at 0.0.0.0:4000 (http)
12:40:05.868 [info] Access GjwappWeb.Endpoint at http://[http://192.168.1.11:4000]:4000

and the all app functions work in the browser.

Then, the mix release builds seemingly ok:

MIX_ENV=prod mix release beta1

…but when I run it, I get the same warning (… :simple_one_for_one strategy…) and I can see all db connections established, but no endpoint access IO message:

warning: :simple_one_for_one strategy is deprecated, please use DynamicSupervisor instead
  (elixir) lib/supervisor.ex:613: Supervisor.init/2
  (elixir) lib/supervisor.ex:565: Supervisor.start_link/2
  (phoenix) lib/phoenix/socket/pool_supervisor.ex:31: Phoenix.Socket.PoolSupervisor.start_pooled/3
  (stdlib) supervisor.erl:379: :supervisor.do_start_child_i/3
  (stdlib) supervisor.erl:365: :supervisor.do_start_child/2

… it just hangs there.

In a separate shell I connect
_build/prod/rel/beta1/bin/beta1 remote
and see a lot of processes, but I’m not sure where to begin.

2

Have you followed the steps outlined here? https://github.com/phoenixframework/phoenix/blob/master/installer/templates/phx_single/config/prod.exs#L53

4 Likes
3

Uhhh…Nooop. Sorry. Thank you thank you thank you.

Apparently i prefer banging my head for a two hours rather than rtfm.

DA
p.s. should I delete original post so people don’t waste their time? Change the title?

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