Error when using LogManager (l4j2) with Java 8 (java.lang.reflect.AnnotatedElement cannot be resolved)

Question

I just encountered a strange error when switching the JDK version of a new Project of mine from 7u45 to 8u20. A harmless LogManager declaration at the beginning of my class

Answer 1

I was using Eclipse Helios with JRE 8 and updating the software solve the problem.

Now I'm using Eclipse Mars and works just fine -> https://eclipse.org/downloads/