Basically, when using JRuby if the timeout value is not commented out in config/initializers/geokit_config.rb then Geokit fails at server startup. Commenting out timeout fixes the issue but also causes other issues deeper in the Geokit Gem/Plugin code.
http://groups.google.com/group/geokit/browse_thread/thread/aa4b7b5eda6d33f4
Thanks for the quick reply :) I'll wait for a new tag of the plugin.
recent release of the plugin work with the gem 1.5