How works the "/admin/reload.do" in struts?
The ReloadAction reloads and reparses the Struts configuration files. The resource bundle used by the MessageResource file is not actually part of the configuration, so it is not reloaded. Some containers do automatically reload property files, but this is not a Struts specific features. It would apply to any Web application using standard resource bundles.
A question to ask in the Tomcat circles might then be "How to configure Tomcat to reload resource bundles when they change.".