who took port 8080, locate gateway

common linux network commands

IF port 8080 is open or not
  lsof -i :514    <== to list any protocol stealing syslog receiver port 514
  lsof -i tcp:8080

to know all network connectoins open:

  sudo netstat -nlp

Print process TREE with 'f' option:
  ps auxf | grep java

locate gateway:
  netstat -nr