How to activate JMX on my JVM for access with jconsole?

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Problem :

How to activate JMX on a JVM for access with jconsole?

Solution :

The relevant documentation can be found here:

Start your program with following parameters:

For instance like this:

  -jar Notepad.jar is not necessarily required
but without it, it doesn’t work on Ubuntu. The error would be something like

01 Oct 2008 2:16:22 PM sun.rmi.transport. customer .TCPTransport$AcceptLoop executeAcceptLoop
WARNING: RMI TCP Accept-0: accept loop for ServerSocket[addr=,port=0,localport=37278] throws The server sockets created using the LocalRMIServerSocketFactory only accept connections from clients running on the host where the RMI remote objects have been exported.
    at sun.rmi.transport. customer .TCPTransport$AcceptLoop.executeAcceptLoop(
    at sun.rmi.transport. customer .TCPTransport$


Also be careful with which
makes access available for anyone, but if you only use it to track the JVM on
your local machine it doesn’t matter.


In some cases I was not able to reach the server. This was then fixed if I set this parameter as well: -Djava.rmi.server.hostname=

Running in a Docker container introduced a whole slew of additional problems for connecting so hopefully this helps someone. I ended up needed to add the following options which I’ll explain below:


Unlike using jconsole locally, you have to advertise a different IP than you’ll probably see from within the container. You’ll need to replace ${DOCKER_HOST_IP} with the externally resolvable IP (DNS Name) of your Docker host.

JMX Remote & RMI Ports

It looks like JMX also requires access to a remote management interface (jstat) that uses a different port to transfer some data when arbitrating the connection. I didn’t see anywhere immediately obvious in jconsole to set this value. In the linked article the process was:

  • Try and connect from jconsole with logging enabled
  • Fail
  • Figure out which port jconsole attempted to use
  • Use iptables/firewall rules as necessary to allow that port to connect

While that works, it’s certainly not an automatable solution. I opted for an upgrade from jconsole to VisualVM since it let’s you to explicitly specify the port on which jstatd is running. In VisualVM, add a New Remote Host and update it with values that correlate to the ones specified above:

Add Remote Host

Then right-click the new Remote Host Connection and Add JMX Connection...

Add JMX Connection

Don’t forget to check the checkbox for Do not require SSL connection. Hopefully, that should allow you to connect.

Note, Java 6 in the latest incarnation allows for jconsole to attach itself to a running process even after it has been started without JMX incantations.

If that is available to you, also consider jvisualvm as it provides a wealth of information on running processes, including a profiler.

I’m using WAS ND 7.0

My JVM need all the following arguments to be monitored in JConsole

On Linux, I used the following params:

and also I edited /etc/hosts so that the hostname resolves to the host address (192.168.0.x) rather than the loopback address (

The below options works for me:
-Djava.rmi.server.hostname={host name}

and remember to open 9010 port in the server

sudo ufw allow 9010/udp
sudo ufw allow 9010/tcp
sudo ufw reload

along with below command line parameters ,

Sometimes in the linux servers , imx connection doesn’t get succeeded. that is because , in cloud linux host, in /etc/hosts so that the hostname resolves to the host address.

the best way to fix it is, ping the particular linux server from other machine in network and use that host IP address in the

-Djava.rmi.server.hostname=IP address that obtained when you ping that linux server.

But never rely on the ipaddress that you get from linux server using the ip that you get there is masked one which is present in the host file.

Run your java application with the following command line parameters:

It is important to use the parameter if you don’t want to setup digital certificates on the jmx host.

If you started your application on a machine having IP address, open jconsole, put in the Remote Process field, and click Connect.

Step 1: Run the application using following parameters.

Above arguments bind the application to the port 9999.

Step 2: Launch jconsole by executing the command jconsole in command prompt or terminal.

Select ‘Remote Process:’ and enter the url as {IP_Address}:9999 and click on Connect button to connect to the remote application.

You can refer this link for complete application.

RUN LOCAL PROCESS JCONSOLE using Remote Process option

To run locally, this worked for me –

I added this in my vm args –
  • I opened JConsole via Intellij Terminal
  • It was showing me all PID’s in grey in local
  • So I selected remote process and logged in using host – localhost:6001
  • Keep empty username & password
  • Then click connect

  • Make sure no other process is running on port 6001. You can also use other ports.
ps -ef | grep java

I had this exact issue, and created a GitHub project for testing and figuring out the correct settings.

It contains a working Dockerfile with supporting scripts, and a simple docker-compose.yml for quick testing.

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