Not able to connect to RabbitMQ

Below are the dependecies of an old phoenix application. This connection works when connecting to CloudAMQP account with erlang version 19.3 and RabbitMQ 3.6.10. But with latest version of Elang it does not work, no erros, I do not see a connection being established in management console of RabbitMQ

{:phoenix, “~> 1.3.0”},
{:postgrex, “>= 0.0.0”},
{:phoenix_ecto, “~> 3.2”},
{:phoenix_html, “~> 2.4”},
{:phoenix_live_reload, “~> 1.0”, only: :dev},
{:gettext, “~> 0.11”},
{:cowboy, “~> 1.0”},
{:comeonin, “~> 1.0”},
{:phoenix_rabbitmq, git: “git://”},
{:exrm, “~> 1.0”},
{:amqp, “~> 0.2.3”, override: true},
{:poison, “~> 3.1”, override: true},
{:geo_postgis, “~> 1.0”},

Then the problem isn’t there and likely your code doesn’t compile or part of it crashes during runtime – Erlang 24 introduced some breaking changes.

Show us the logs of your app?

compilation works fine without issues, no run time errors just that the connection is not shown in the management console. Same code with just changing the MQ DNS works fine, if I change to new DNS it does not establish the connection. No errors during run time

Oh, I see. Sorry then, no idea in this case.

if I copy the config to dev.exs and start using mix phx.server I see the connection is made. but crating the build and release and starting the application using start does not connect to RabbitMQ