title: log4j log files from an external jar are not created when using the jar in another log4j project
body: <p>I am new to log4j but I've been reading for almost an hour, and I dont know how to solve this.</p>
  
  <p>I have a jar file A which uses log4j and writes logs to the console and to a file.</p>
  
  <p>I also have a java project, which uses external jar A. If the java project doesnt use log4j, then I can see the logs by A when running the java project in the console and in the file.</p>
  
  <p>But if I want to use lof4j in the java project, then log file by jar module A is now not created, why? do i have to write any special configuration in lof4j.properties file for module A or the java project? thanks!</p>