Some hints on debugging remote jconsole Connection problems

jconsole_remote_hints

Expressed as ant xml, but these are system properties that should be set on the JVM to be instrumented:

      <sysproperty key="com.sun.management.jmxremote" value="true"/>
      <sysproperty key="com.sun.management.jmxremote.port" value="38383" />
      <sysproperty key="com.sun.management.jmxremote.authenticate" value="false" />
      <sysproperty key="com.sun.management.jmxremote.ssl" value="false" />
      <sysproperty key="java.rmi.server.hostname" value="10.10.10.10" /><!-- ip address of the JVM you wanna connect to -->

To see debugging information when running jconsole client:

     jconsole -debug hostname.mchange.com:38383

 ...or, for lots more...
 
     jconsole -debug -J-Djava.util.logging.config.file=/Users/swaldman/tmp/logging.properties hostname.mchange.com:38383

FIREWALL ISSUES!

jconsole is an RMI-based service that does not play nicely with firewalls. If you need to access JVMs from outside, you'll need to punch holes not just in the jmxremote port, but over the full range over which an "anonymous" port may be allocated! e.g. at the moment I succeed having (temporarily) opened 35000 to 65000. Not a great thing!

Some references:

  https://blogs.oracle.com/jmxetc/entry/troubleshooting_connection_problems_in_jconsole
  http://docs.oracle.com/javase/1.5.0/docs/guide/management/faq.html
  http://www.netcluesoft.com/rmi-through-a-firewall.html