title: How to override a specific value of log4j.properties?
body: <p>I'm using a jar that has <code>log4j.properties</code> included. One property of this jar maps to a static local resource with a path that does of course not exist on my system.</p>
  
  <p>Problem: my custom log4j.properties is somehow not taken into account, even thought it is on the classpath.
  What do I have to change so that the existing log4j from the jar remains valid, but only a specific value is overridden with my custom log4j?</p>
  
  <p><code>log4j.appender.InfoFileAppender.File=d:/logs/info.log</code></p>