I used to use IDEA to debug my web-app, no problem. Recently, a mess-up happened when trying to upgrade KUbuntu from 14.04 LTS and I ended-up having to reinstall my entire OS from scratch. Now I am running KUbuntu 15.10, fresh install.
Debugging was working fine for a few hours, until either some update or the installation of VirtualBox 5.10 (using Muon Discover) happened and the running or debugging the same project configuration started yielding:
Error running UI: Address localhost:1099 is already in use
Following advice obtained with several Google searches, I tried:
1. 1099 is the port mentioned for the JMX module in the run/debug configuration. If I change the port, the error message changes accordingly.
2. Doing netstat and/or lsof, this port is never being monitored by any process at all. My firewall is off, IPV6 is disabled, and I've disabled every IDEA plugin I can think of.
3. Editing /etc/hosts
Nothing is working. The log at /home/userName/.IntelliJIdea14/system/log does not show any error.
I really hope someone here can help me sniff-out the cause.
# Distributor ID: Ubuntu
# Description: Ubuntu 15.10
# Release: 15.10
# Codename: wily
# IntelliJ IDEA 14.1.5 Ultimate (licensed)
# java version "1.8.0_66"
# Java(TM) SE Runtime Environment (build 1.8.0_66-b17)
# Java HotSpot(TM) 64-Bit Server VM (build 25.66-b17, mixed mode)