how to take thread dump for java process

use jstack <pid>

conflict between node and nodejs

install below:

sudo apt-get install nodejs-legacy

setting up nginx on ubuntu

below url have good content:
https://www.digitalocean.com/community/tutorials/how-to-configure-nginx-as-a-reverse-proxy-for-apache

Aerospike - fast database system

try it
aerospike.com