net::ERR_CONNECTION_REFUSED when I send a push notification

I am using digital ocean and Ubuntu 14.04 x64 in production and it is deployed in a docker container

Push notifications have been working successfully till recently.

When I send a push notification it works correctly in development but when I send one in production I get a **net::ERR_CONNECTION_REFUSED** error in the console

I also get **W/chromium(10080): [WARNING:aw_network_delegate.cc(66)] http://app.myapp.com/sockjs/info?cb=jfdltrzzsa#-102#1**

on the node server side.

Any clue to what is the problem and how I can fix it will be greatly appreciated

Start by reproducing the production deployment on DigitalOcean with Ubuntu 14.04 in its Docker container, then inspect the failing app.myapp.com/sockjs/info connection and compare it with development. Check the production network and server configuration; done means push notifications work in production without net::ERR_CONNECTION_REFUSED.

Written by the indexing model from the issue text.