Ubuntu Change JDK from other to sun jdk

http://www.cyberciti.biz/faq/howto-ubuntu-linux-install-configure-jdk-jre/

http://balajitheone.blogspot.com/2011/08/installing-oracle-sun-jdk-17-on-ubuntu.html

http://ubuntuguide.net/install-sun-java-6-jrejdk-from-ppa-in-ubuntu-11-04

Audacity: Noise removal- some param values

http://www.ehow.com/how_5858938_improve-wav-file-understand-speech.html - some parameter values for the compressor and noise gate. Not yet tested myself.

CS books and book sources

http://tenlittleniggers.com/index/index.php?dir=Library/Computer%20Science/

http://ebookee.org/

Singleton bean creation not allowed while the singletons of this factory are in destruction

What worked for me:
Ref: http://forums.alfresco.com/en/viewtopic.php?f=8&t=27622

Was using openJDK.
Changed to Sun JDK 1.6.0_24.
http://www.cyberciti.biz/faq/howto-ubuntu-linux-install-configure-jdk-jre/ - to change the JDK. I had already installed both JDKs earlier. Just that the default was openJDK.
Exception gone.