Problem Start Cortex on Ubuntu 16.04

[re-bob]

Request Type

Bug

Work Environment

Question	Answer
OS version (server)	Debian, Ubuntu
Cortex version / git hash	1.1.2
Package Type	deb

Problem Description

After install Cortex package (deb) the service (Cortex) does not start and show a stack java error

Steps to Reproduce

1. Install a new Ubuntu 16.04.02 Server and update to Ultimate kernel
2. As a Guide install cortex by .deb
3. Start Cortex (systemctl start cortex)
    

Possible Solutions

After install cortex run this command:

sudo apt-get remove the openjdk-9-jre-headless
sudo apt-get install open-jk-8-jre-headless
sudo apt-get install cortex

Complementary information

The problem is that on Ubuntu 16.04 the cortex package installs openjdk-9 by default but cortex works with openjdk 8.

Thanks to Nabil Adouani for fix the problem :)