Detected both log4j-over-slf4j.jar AND slf4j-log4j12.jar on the class path, preempting StackOverflowError.

I was hitting the same problem when working with Apache tomcat . .


Solution Steps :

1. Backup your pom.xml somewhere.
2. Go to your pom.xml and on the bottom tab and click "Dependency Hierarchy" tab. 
3. From there search for log4j-over-slf4j. 
4. Exclude all instances of this dependency (right click on the instance and "Exclude Maven Artifact"). After you have no more log4j-over-slf4j appearing save your POM and try to run the program. 
5. If it still doesn't work then undo the changes you just made and exclude all instances of slf4j-log4j12.

Hopes this will resolve your problem