CODEWITHSUNDEEP
erlangelixirphoenix-framework
CherryCoda
CherryCoda

Reputation: 53

Elixir Phoenix shutdown: failed to start child

I'm getting the following error when starting my app in production mode. All works fine on dev side, can migrate, compile and release without issue on the production app but when running it, it crashes on start. I'm sure it is something very obvious I am missing. I am running Erlang 19 and Elixir 1.3.2.

17:42:52.768 [info] Application curriculum exited: Curriculum.start(:normal, []) returned an error: shutdown: failed to start child: Curriculum.Endpoint ** (EXIT) shutdown: failed to start child: Phoenix.Endpoint.Server ** (EXIT) an exception was raised: ** (FunctionClauseError) no function clause matching in System.get_env/1 (elixir) lib/system.ex:358: System.get_env(4000) (phoenix) lib/phoenix/endpoint/server.ex:34: Phoenix.Endpoint.Server.to_port/1 (phoenix) lib/phoenix/endpoint/server.ex:28: Phoenix.Endpoint.Server.default/3 (phoenix) lib/phoenix/endpoint/server.ex:17: anonymous fn/5 in Phoenix.Endpoint.Server.init/1 (elixir) lib/enum.ex:1623: Enum."-reduce/3-lists^foldl/2-0-"/3 (phoenix) lib/phoenix/endpoint/server.ex:15: Phoenix.Endpoint.Server.init/1 (stdlib) supervisor.erl:294: :supervisor.init/1 (stdlib) gen_server.erl:328: :gen_server.init_it/6 {"Kernel pid terminated",application_controller,"{application_start_failure,curriculum,{{shutdown,{failed_to_start_child,'Elixir.Curriculum.Endpoint',{shutdown,{failed_to_start_child,'Elixir.Phoenix.Endpoint.Server',{function_clause,[{'Elixir.System',get_env,[4000],[{file,\"lib/system.ex\"},{line,358}]},{'Elixir.Phoenix.Endpoint.Server',to_port,1,[{file,\"lib/phoenix/endpoint/server.ex\"},{line,34}]},{'Elixir.Phoenix.Endpoint.Server',default,3,[{file,\"lib/phoenix/endpoint/server.ex\"},{line,28}]},{'Elixir.Phoenix.Endpoint.Server','-init/1-fun-0-',5,[{file,\"lib/phoenix/endpoint/server.ex\"},{line,17}]},{'Elixir.Enum','-reduce/3-lists^foldl/2-0-',3,[{file,\"lib/enum.ex\"},{line,1623}]},{'Elixir.Phoenix.Endpoint.Server',init,1,[{file,\"lib/phoenix/endpoint/server.ex\"},{line,15}]},{supervisor,init,1,[{file,\"supervisor.erl\"},{line,294}]},{gen_server,init_it,6,[{file,\"gen_server.erl\"},{line,328}]}]}}}}},{'Elixir.Curriculum',start,[normal,[]]}}}"}

Prod.exs file contents

http: [port: {:system, 4000}],url: [host: "example.com"],cache_static_manifest: "priv/static/manifest.json",server: true
config :phoenix, :serve_endpoints, true

import_config "prod.secret.exs"

Upvotes: 4

Views: 4068

Answers (1)

Dogbert
Dogbert

Reputation: 222040

Your value for port in config/prod.exs is wrong. It should either be:

port: 4000

to always run on port 4000, or:

port: {:system, "PORT"}

to read the port from the environment variable PORT (you can change the name to any other string).

Upvotes: 3

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