jConsole – JMX remote access on Tomcat

By mkyong | Updated: March 12, 2014

Viewed: 1,846 (+10 pv/w)

Tags: jconsole jmx tomcat

In this tutorial, we will show you how to use jConsole to remote access a Tomcat instance, for JVM monitoring stuff.

Tools and environment used :

1. Ubuntu 13 + Tomcat 7 + 192.168.1.142
2. Windows 8 + jConsole + 192.168.1.200

1. Tomcat + JMX

To connect with jConsole, Tomcat need to enable the JMX options. To solve it, create a {tomcat-folder}\bin\setenv.sh (if not exists), and put the following values :

-Dcom.sun.management.jmxremote 
-Dcom.sun.management.jmxremote.port={port to access} 
-Dcom.sun.management.jmxremote.authenticate=false 
-Dcom.sun.management.jmxremote.ssl=false
-Djava.rmi.server.hostname={optional, allow what ip to access this Tomcat}

for example,

export JAVA_OPTS="-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=9999 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false"

Restart Tomcat, now you can connect to this Tomcat via jConsole in port 9999.

2. jConsole Example

2.1 Start jConsole.

c:\>jconsole

2.2 Select “Remote Process”, type the Tomcat ip and port to connect : 192.169.1.142:9999.

2.3 Clicks on the button “Insecure connection”. Tomcat detail is shown if connection is successful.

References

1. Monitoring and Managing Tomcat
2. Oracle : jConsole
3. Wikipedia : jConsole