Class not found: com.mchange.v2.ser.Indirector

I was trying to setup CAS server for Liferay CE 6.2  based on "Liferay 6.x Portal Enterprise Intranets Cookbook" but stumbled with the above error. I did follow all the steps diligently, but I guess the author might have missed additional library to add to ${TOMCAT_HOME}/webapps/cas-server-webapp-4.0.0/WEB-INF/lib that is "mchange-commons-java".

I quickly search for this library in my machine if any as I was so lazy to search in out in google and found it in Liferay's tomcat bundle under webapps/ROOT/WEB-IF/lib folder.

Tips: You may want to use find command in Centos (or any linux-based OS) search by filename with "sudo find / -name 'mchange-commons-java*' -print".


I hope that helps someone outthere.

Happy Godek'king!

Remote JMX Connection Issue

Recently I tried to remotely connect to Liferay 6.2 's tomcat bundle on JMX via JConsole and JVisualVM with no success. Both applications repeatedly unable to connect via rmi. This boggled me as this never happened to me if the same to be done on Windows or my OSX macbook.

The only difference this time is I have Centos 7 running on my macbook. Yes, Centos 7, trying to get my hands dirty back on Linux. Installing Centos 7 on Macbook is another story. It took me a few days of misery and frustration until LiveCD saved me. OK, enough about me.

So, as usual you would need to supply VM arguments as follow:

-Dcom.sun.management.jmxremote 

-Dcom.sun.management.jmxremote.port=9999

-Dcom.sun.management.jmxremote.ssl=false

-Dcom.sun.management.jmxremote.authenticate=false

Tips: You can quickly kill the process that is listening to port 9999 with "fuser -k 9999/tcp" command.

Normally this is would suffice, but not this time.
Further tests to narrow down to possible root cause includes:

1. Telnet to port - OK
# telnet <host-ip> 9999

2. Run local JConsole and JVisualVM - OK (although unneccessary)

Tips: You may completely disable firewall in Centos 7 with "sudo systemctl disable firewall-d" or
open up specific port with "sudo firewall-cmd --zone=public --add-port=9999/tcp && sudo firewall-cmd --reload"

After exhaustively searching through google and stackoverflow finally I found a blog page that suggest additional argument. Ironically, the blog post entry has nothing to do with my problem, duhh...additionally I found this via a comment in stackoverflow entry.

So, the additional argument that make it work is -Dcom.sun.management.jmxremote.rmi.port=9999
Feel me? yeah, how silly is that and I don't know why and how that works. So, help me god if anyone would generously want to explain.

'

-Dcom.sun.management.jmxremote 

-Dcom.sun.management.jmxremote.port=9999

-Dcom.sun.management.jmxremote.rmi.port=9999

-Dcom.sun.management.jmxremote.ssl=false

-Dcom.sun.management.jmxremote.authenticate=false

Made the changes then, I fired JConsole/JVisualVM and it works!

I hope that helps some one outthere.

Happy Godek'king!!

FYI "Godek" slang means "hack" in Malay :)

java.io.IOException: Cannot recover key

For those who are NOT familiar with configuring tomcat HTTPS connector (I had apache-tomcat-7.0.34), like me, this error can be frustrating. It turned out to be a simple fix. I am assuming you have properly generated a tomcat key, a keystore and imported them successfully into JAVA cacerts keystore. As for my case I chose my own keystore filename, my own kesytore pass(word) and my own tomcat key pass(word). Unfortunately, these require explicitly be entered in your tomcat's server.xml. 

Consider the following template in the tomcat's server.xml file after you uncommented it.

If you named your keystore as ".keystore" with key and keystore pass(word) as "changeit" and left it reside in your home dir (i.e.: /home/hamid) , then above setup would work happily just like that.

Unfortunately, for most of the time it is not the case as you would name your keystore to some other name, located to some other location (folder) and both key & keystore with some other pass(word).

For example:

Keystore name: keystore.jks

Keystore folder: /home/hamid/secret/store

Keystore password: password1

Key password: password2

Then you would want to do the following:

I hope that helps.

Happy Godek'king!

FYI "Godek" slang means "hack" in Malay :)