Meteor 1.3/1.4 + Node 4.x + Mongo + Ubuntu 16.X Server Crashes with no trace

I am helping debug an random app crash. To build and deploy, we use the standard commands:

meteor build and npm install (on aws ubuntu)

The app is up and running, the mongo instance does its thing, maps are populated but after hitting refresh, or 2 or 3 connections the node process dies. Mongod is still alive. That is it. No logs/dumps in /var/log to shed any light.

I have attached node-inspector and debugged the server side remotely but the only novelty are a couple of mongo exceptions on the server code. The application seemed to be running

I have sniffed with httpry (sudo httpry -i eth0) and hit the url from a browser and no traffic pops up. Which is puzzling.

Any pointers?

via efekctive