Using the JDK5 JConsole JMX Console

Another good overview is here: http://java.sun.com/developer/technicalArticles/J2SE/jconsole.html

To use jconsole, obviously you need to be using a release version of jdk5+. See the JBoss vs Java JDK Version Matrix page for which jboss versions work with jdk5.

Using jconsole with a Local Server

#
# Specify options to pass to the Java VM.
#
if [ "x$JAVA_OPTS" = "x" ]; then
   JAVA_OPTS="-server -Xms128m -Xmx128m"
fi

# Enable the jconsole agent locally
JAVA_OPTS="$JAVA_OPTS -Dcom.sun.management.jmxremote"

Next, launch jconsole, $JAVA_HOME/bin/jconsole. This will bring up a java app with a connection dialog like:

Using jconsole with a Remote Server

#
# Specify options to pass to the Java VM.
#
if [ "x$JAVA_OPTS" = "x" ]; then
   JAVA_OPTS="-server -Xms128m -Xmx128m"
fi

# Enable the jconsole agent remotely on port 12345
JAVA_OPTS="$JAVA_OPTS -Dcom.sun.management.jmxremote.port=12345"

Note that this requires password security to be configured. To disable security and ssl transport, add two additional properties:

# Enable the jconsole agent remotely on port 12345
JAVA_OPTS="$JAVA_OPTS -Dcom.sun.management.jmxremote.port=12345"
JAVA_OPTS="$JAVA_OPTS -Dcom.sun.management.jmxremote.authenticate=false"
JAVA_OPTS="$JAVA_OPTS -Dcom.sun.management.jmxremote.ssl=false"

To connect the jconsole to use specify the hostname:NNN combo for the server. NNN is the same port number specified in the system property, for example $JAVA_HOME/bin/jconsole lamia:12345. You can also start jconsole and then use the Connection/New Connection... menu item to bring up a connect dialog:

Referenced by:
FAQJBossJMX
ThreadDump

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