I have a java web app running on a tomcat server with some Rest interfaces that have run without fail for months. Now we put another war in their and it has stopped the rest interfaces completely. The rest of the app runs and can talk to the database, but we get 503 errors when we look for the interfaces. The only thing of note, is the new war immediately throws an exception and fails because of a missing dependency.
What should I be looking for, for the cause of this?