Relational Junction will work on any web application server, including WebLogic, if the app server supports Java 1.8. Nearly all of our customers use Tomcat, since it provides all the services required for the web administration without any licensing costs. Relational Junction is primarily a batch system. You can fire off jobs in the web user interface, but stopping Tomcat does not kill the jobs. It is far better to have a dedicated server for Relational Junction, because of the batch orientation, than use a web application server with many other transactional applications running.