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Java-monitor relies on JMX to gather statistics from your Jetty instance. Enabling JMX is a little different for each version Jetty. See Running jetty with jconsole for instructions on how to configure jmx for your Jetty versionturn on jmx when starting up your server instance.
Sign up on Java-monitor
If you don't have a Java-monitor account, visit http://java-monitor.com/forum/register.php to sign up.
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