Getting VisualVM to Connect to Railo 4
VisualVM is a great Java VM debugging tool that can show you VM performance as it runs your code. Since Railo runs on Java VM, this is a great tool to see if your code is leaking memory.
NOTE: This setup is on a debian linux box running railo installed via the script with an apt-get install apache frontend. This should behave similarly on ubuntu, centos, etc. Please leave comments if you have issues.
Edit /opt/railo/tomcat/bin/setenv.sh (~ line 6)
Append to the line with your JAVA_OPTS variable the commands in red below. ( I spaced out the code below for readability, but keep the red text to one line)
JAVA_OPTS=”-Xms512m -Xmx3G -XX:MaxPermSize=256m
-Djava.rmi.server.hostname=<your server’s ip — i.e. 220.127.116.11>
“; # memory settings
Save and then restart “/etc/init.d/railo_ctl restart”
-You can use any available port number
-Use your server’s real IP to tell where to bind the listener, without it, the listener will be localhost only.