Restarting your java context
Our java hosting servers have 2 different java environments, some use Resin and some use Tomcat. When your account is hosted in Resin, it intelligently works out when to reload contexts on its own, however, when you are hosted in Tomcat, you need to manually tell Tomcat to reload your context.
How to reload your Tomcat context
Login to your hosting accounts control panel (http://yourdomain.com:2082) and in the Advanced window you will see the Reload Context icon, click this to be presented with a list of of contexts in your account, and click reload to reload any particular context.