This week's book giveaway is in the Reactive Progamming forum. We're giving away four copies of Reactive Streams in Java: Concurrency with RxJava, Reactor, and Akka Streams and have Adam Davis on-line! See this thread for details.
The Eclipse Help contains information on debugging servlets and JSPs. Do Help | Help Contents, and in the Help dialog select Web Tools Platform User Guide | Using The Server Tools | Application Testing And Publishing | Debugging Applications On A Server.