DeprecationWarning: sys is deprecated. Use util instead.

(node) sys is deprecated. Use util instead.

nodejs/node-v0.x-archive#3577

Noticed that there is already a PR for that. Can disregard this one.

I have the same issue

[ricardoee]

This appears to still be an issue?

13:50:05 CRITICAL [app] (node:53916) [DEP0025] DeprecationWarning: sys is deprecated. Use util instead.

[mach666]

One can fix this warning at their personal project. Its a manual process for fixing this issue in a individual project. Go to your node modules folder find the logger folder inside it. Inside the logger folder you will find a logger.js file. Open the logger.js file and do as following code suggests:-
var sys=require('sys') -----------> var sys=require('util')
means replace the code on LHS via code on RHS