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

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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
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