How to monitor a Java program using Jconsole?

Question

I have written a program to print number from 1 to 200 using 2 threads.

Now I want to monitor this program using JConsole.

Basically I want to learn how to use JConsole for monitoring an application.

I searched google but couldn't find something useful.

How I can achieve this?

When I started jconsole.exe in bin folder. It asks for hostname and port number. Here in my case, there is none, I guess. Can somebody guide.

score 15 · Accepted Answer · edited Jun 16 '17 at 07:42

15

You need to enable JMX by adding the following JVM arguments :

-Dcom.sun.management.jmxremote
-Dcom.sun.management.jmxremote.authenticate=false
-Dcom.sun.management.jmxremote.port=8484
-Dcom.sun.management.jmxremote.ssl=false

These parameters will allow any JMX monitoring tool to access and monitoring your application.

Also i suggest you to use visualVM its more powerful tool. some features for visualVM:

Provide a CPU profiling.
Provide all info about Threads.
Provide the JVM Heap and the memory states.
Provide Info about the GC activities.

edited Jun 16 '17 at 07:42

Raphael Amoedo

4,233
4
28
37

answered Mar 09 '14 at 08:54

Salah

8,567
3
26
43

Where should I add these lines? – Thinker Mar 09 '14 at 08:55
1

If your using `Eclipse IDE`, then `Right click on your project -> Properties -> Run/Debug Settings -> Select your launcher class -> Arguments tap` – Salah Mar 09 '14 at 09:04
Start you application, the start `jconsole`, and you'll find a you app process. – Salah Mar 09 '14 at 09:13
Welcome, and please don't forget to accept it as answer if that solve your problem :). – Salah Mar 09 '14 at 09:22

Sandeep Chatterjee · Answer 2 · 2014-03-09T13:22:28.880

Let's say you have a class Test under package p1 where you have the code to print numbers from 1 to 200 using 2 threads(which you want to monitor).

So to use jconsole for monitoring your application, you would need to compile and execute your code first and while your code is executing...

Start -> Run -> jconsole.exe and hit/press Enter
Select the application which you want to monitor and then click Connect.

Alternatively,you can use VisualVM for this purpose as well.

score 1 · Answer 3 · answered Feb 02 '16 at 11:12

1

JConsole find all the running application at the time of JConsole start-up. Then only the currently running applications port and host will be displayed in the list. So first you need to start the application then start the JConsole.

answered Feb 02 '16 at 11:12

Sonu

712
9
7

How to monitor a Java program using Jconsole?

3 Answers3

Linked