I'm following this guide to setup Tomcat 8 on Ubuntu Server 16.04 using Apache2's mod_jk module as a reverse proxy:
https://www.digitalocean.com/community/tutorials/how-to-encrypt-tomcat-8-connections-with-apache-or-nginx-on-ubuntu-16-04
Everything works until the last step, which is to change the HTTP and AJP Connectors in server.xml to only listen on localhost. Here's the change I made to the AJP Connector (added localhost in the address):
Before this change, typing
https://myhostname takes me to the Tomcat administration page; after it, I get "503 Service Unavailable".
Here's the relevant portion of mod_jk.log