General Info

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h1. Using jmx-console & tomcat status (production)

In production environment, the *Jboss* application server listens to IP, *127.0.0.1* and port *8080*. In order to use the jmx-console through *VPN*, one must redirect the traffic in the port *8080* to a specific port. In this guide, the port, *9999* will be used for this purpose.

h2. Steps

# login to the server via *ssh* which has jmx-console running

# *cd* to */tmp*

<pre>

$ cd /tmp

</pre>

# locate the file, *backpipe*

## if *exists*, skip and proceed to next step

## if *not exists*, execute(without the dollar sign):

<pre>

$ mknod backpipe p

</pre>

# execute the following command for *port traffic redirection*(without the dollar sign):

<pre>

$ nc -l -p 9999 0<backpipe | nc 127.0.0.1 8080 1>backpipe

</pre>

# launch web browser and navigate to the jmx-console:

<pre>

e.g. http://<<vpn IP address>>:9999/jmx-console/

</pre>

# done

* *[Important Note]* You may need to re-execute the command in *step 4* periodically should it get terminated.

* *[Important Note]* One should use it for *troubleshooting* purpose only, not *monitoring*.

* *[Important Note]* The port *8080* can be redirected because there's *no application* is actively using the port, instead the ajp port, *8009* is being used to serve all web request.

h2. Example URLs for jmx-console & tomcat status

* List of currently active web request:

<pre>http://<<ip address>>:9999/status?full=true</pre>

* Connection pool usage: 

<pre>

http://<<ip address>>:9999/jmx-console/HtmlAdaptor?action=inspectMBean&name=jboss.jca%3Aservice%3DManagedConnectionPool%2Cname%3D<<connection pool name>>

ip address - IP address of the server

connection pool name - the name of the connection pool

</pre>

* Thread Dump & memory usage:

<pre>

http://<<ip address>>:9999/jmx-console/HtmlAdaptor?action=inspectMBean&name=jboss.system%3Atype%3DServerInfo

</pre>