title: Difference between keeping jar files in WAR and Tomcat lib folder
body: <p>I have web application. I want Eclipse BIRT reports in that application. 
  Tomcat is not even started by memory error if i add BIRT jar files into Tomcat lib.</p>
  
  <pre><code>If build WAR with that jars only application runs
  </code></pre>
  
  <p>What is the difference and what is the problem behind this?</p>