title: Spring boot embedded tomcat logs
body: <p>i'm using spring boot embedded tomcat with spring boot 1.5.9 , 
  im also using Log4j2.</p>
  
  <p>recently i exerience problems during load, so i want to understand better the tomcat logs [Not the access Logs] , i tried (in application.properties) : </p>
  
  <pre><code>logging.level.org.apache.tomcat: INFO
  logging.level.org.apache.catalina: INFO
  </code></pre>
  
  <p>but none of the above worked. is there any other way to achieve it ? </p>