Windows 10 - Protocol 'inet_tcp': register/listen error: econnrefused

[Sam Aaron]

Hi,

I just tried to get livebook up and running on Windows 10.

I cloned the repo, fetched the deps and the only thing I changed from the README's instructions was to set the env variable as a separate command (I couldn't figure how to do this on the same line as is typical for bash-like shells).

However, whilst the firewall did pop up a window to ask me for permission (and I've checked the rules and all instances of erl.exe do have permission) it failed to boot:

C:\Users\samaa\Development\elixir\livebook>set MIX_ENV=prod

C:\Users\samaa\Development\elixir\livebook>mix phx.server
==> earmark_parser
Compiling 1 file (.yrl)
Compiling 2 files (.xrl)
Compiling 3 files (.erl)
Compiling 32 files (.ex)
Generated earmark_parser app
===> Compiling ranch
===> Compiling telemetry
==> telemetry_metrics
Compiling 7 files (.ex)
Generated telemetry_metrics app
===> Compiling telemetry_poller
==> jason
Compiling 8 files (.ex)
Generated jason app
==> phoenix_pubsub
Compiling 11 files (.ex)
Generated phoenix_pubsub app
===> Compiling cowlib
===> Compiling cowboy
===> Compiling cowboy_telemetry
==> mime
Compiling 2 files (.ex)
Generated mime app
==> plug_crypto
Compiling 5 files (.ex)
Generated plug_crypto app
==> plug
Compiling 1 file (.erl)
Compiling 41 files (.ex)
warning: System.stacktrace/0 is deprecated, use __STACKTRACE__ instead
  lib/plug/conn/wrapper_error.ex:23

Generated plug app
==> phoenix_html
Compiling 8 files (.ex)
Generated phoenix_html app
==> plug_cowboy
Compiling 5 files (.ex)
Generated plug_cowboy app
==> phoenix
Compiling 66 files (.ex)
Generated phoenix app
==> phoenix_live_view
Compiling 22 files (.ex)
Generated phoenix_live_view app
==> phoenix_live_dashboard
Compiling 36 files (.ex)
Generated phoenix_live_dashboard app
==> livebook
Compiling 70 files (.ex)
Generated livebook app
09:44:35.165 [info] Protocol 'inet_tcp': register/listen error: econnrefused

** (Mix) Could not start application livebook: exited in: Livebook.Application.start(:normal, [])
    ** (EXIT) an exception was raised:
        ** (RuntimeError) failed to start distributed node
            (livebook 0.1.0) lib/livebook/application.ex:47: Livebook.Application.ensure_distribution!/0
            (livebook 0.1.0) lib/livebook/application.ex:9: Livebook.Application.start/2
            (kernel 7.2) application_master.erl:277: :application_master.start_it_old/4
09:44:35.169 [info] Application livebook exited: exited in: Livebook.Application.start(:normal, [])
    ** (EXIT) an exception was raised:
        ** (RuntimeError) failed to start distributed node
            (livebook 0.1.0) lib/livebook/application.ex:47: Livebook.Application.ensure_distribution!/0
            (livebook 0.1.0) lib/livebook/application.ex:9: Livebook.Application.start/2
            (kernel 7.2) application_master.erl:277: :application_master.start_it_old/4

C:\Users\samaa\Development\elixir\livebook>mix phx.server
09:44:51.824 [info] Protocol 'inet_tcp': register/listen error: econnrefused

09:44:51.831 [info] Application livebook exited: exited in: Livebook.Application.start(:normal, [])
    ** (EXIT) an exception was raised:
        ** (RuntimeError) failed to start distributed node
            (livebook 0.1.0) lib/livebook/application.ex:47: Livebook.Application.ensure_distribution!/0
            (livebook 0.1.0) lib/livebook/application.ex:9: Livebook.Application.start/2
            (kernel 7.2) application_master.erl:277: :application_master.start_it_old/4
** (Mix) Could not start application livebook: exited in: Livebook.Application.start(:normal, [])
    ** (EXIT) an exception was raised:
        ** (RuntimeError) failed to start distributed node
            (livebook 0.1.0) lib/livebook/application.ex:47: Livebook.Application.ensure_distribution!/0
            (livebook 0.1.0) lib/livebook/application.ex:9: Livebook.Application.start/2
            (kernel 7.2) application_master.erl:277: :application_master.start_it_old/4

[Juha]

Hi Sam! What happens if you first run iex --sname test or equivalent, and then try to start Livebook again? Does Windows ask you for any additional firewall rules?

[Sam Aaron]

Yep, that fixed it.

Running iex --sname test made the firewall ask me to allow epmd.exe which then allowed mix phx.server to run :-)

Did I miss a step somewhere?

[José Valim]

@samaaron No, nothing is missing. I will improve the error message. :)

[Sam Aaron]

Thanks @juhalehtonen and @josevalim!

LiveBook does now start, but now I can't evaluate any code. I'm guessing it's similar to #194