Tomcat -JConsole - Remote connection

This is the procedure to connect JConsole to a remote tomcat server.

[Remote] Configure tomcat

Edit/create a file $TOMCAT_HOME/bin/setenv.sh.

Add de following JAVA_OPTS params:

• -Dcom.sun.management.jmxremote
• -Dcom.sun.management.jmxremote.port=9999
• -Dcom.sun.management.jmxremote.rmi.port=9998
• -Dcom.sun.management.jmxremote.authenticate=false
• -Dcom.sun.management.jmxremote.ssl=false

You can add them as follow:

JAVA_OPTS="$JAVA_OPTS -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=9999 -Dcom.sun.management.jmxremote.rmi.port=9998 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false"

Restart tomcat.

[Remote] Configure host

You need to open these ports in order to allow remote connections from other machines. You can do that by using "firewall-cmd":

   firewall-cmd --zone=public --add-port=9999/tcp
   firewall-cmd --zone=public --add-port=9998/tcp
   firewall-cmd --zone=public --permanent --list-ports
   firewall-cmd --zone=public --list-ports

[Local] Configure JConsole

From local host launch JConsole targeting 9999 (in my case, the target server is in PRE-C01-SRV01)

If you have problems you can enable JConsole log by creating a logging config file, for example, jconsole-logging.properties:

Logging.properties

handlers = java.util.logging.ConsoleHandler


.level = INFO

java.util.logging.ConsoleHandler.level = FINEST

java.util.logging.ConsoleHandler.formatter = \

java.util.logging.SimpleFormatter

// Use FINER or FINEST for javax.management.remote.level - FINEST is

// very verbose...

javax.management.level = FINEST

javax.management.remote.level = FINEST

Launch JConsole from command line with the following params:

    jconsole -J-Djava.util.logging.config.file=jconsole-logging.properties