I have a confession to make; I am obsessed with problem solving….. I know you’re probably looking forward to seeing how I solved the problem, but I figured you might be interested in some background information before we proceed. I was in the process of installing a digital repository tool (DSpace) and it so happens that Oracle Java JDK 6+ is one of the prerequisite software required; the result of not installing Oracle’s JDK is below
dspace@PHRLIG001:/usr/local/dspace/bin$ /usr/local/dspace/bin/dspace create-administrator Exception in thread "main" java.lang.NoClassDefFoundError: org/dspace/kernel/DSpaceKernel| at org.dspace.app.launcher.ScriptLauncher.main(ScriptLauncher.java:48) Caused by: java.lang.ClassNotFoundException: org.dspace.kernel.DSpaceKernel at java.net.URLClassLoader$1.run(URLClassLoader.java:217) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:205) at java.lang.ClassLoader.loadClass(ClassLoader.java:321) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294) at java.lang.ClassLoader.loadClass(ClassLoader.java:266) ... 1 more
Unfortunately, Ubuntu 10.10 comes bundled with OpenJDK instead. I initially thought installing the Oracle JDK would be a straight forward process… boy was I wrong. The apt-get update couldn’t get through to a couple of repositories and as a result, I was unable to download the JDK.
Err http://archive.canonical.com maverick Release.gpg Could not connect to archive.canonical.com:80 (188.8.131.52), connection timed out Err http://archive.canonical.com/ubuntu/ maverick/partner Translation-en Unable to connect to archive.canonical.com:http: Err http://archive.canonical.com/ubuntu/ maverick/partner Translation-en_ZA Unable to connect to archive.canonical.com:http: Err http://archive.canonical.com lucid Release.gpg
I literally tried almost all solutions offered online and finally stumbled upon one that worked for me. I basically sit behind a proxy server and had to explicitly tell apt-get where to find proxy details.
phiri@PHRLIG001:/etc/apt$ sudo vi apt.conf
Change contents of apt.conf file to below.
I have CNTLM configured on my machine, but you could just as well replace the contents with actual details of the proxy server you connect through; if that is the case, replace the contents of the apt.conf file with the code below.
I hope this helps.