title: How to make Pax logging to use the loggback config instead of the standard log4j properties like syntax
body: <p>I have some services in tomcat and trying to move to apache karaf.</p>
  
  <p>I have a existing service which uses logback for logging configuration.</p>
  
  <p>I tried to make same configuration in osgi, but could not achieve. Any please let me know what could be the problem?</p>
  
  <pre><code>  org.ops4j.pax.logging.cfg
           org.ops4j.pax.logging.logback.config.file=${karaf.home}/etc/logback.xml
  </code></pre>
  
  <p>logback.xml is available at ${karaf.home}/etc/
  --.</p>
  
  <p>Apache Karaf version : 3.0 , 
  pax logging 1.7.1 which is packaged with karaf from build.</p>
  
  <p>After above configuration change, my karaf.log contents are :</p>
  
  <pre><code>   Jul 02, 2014 4:21:32 PM org.apache.karaf.main.lock.SimpleFileLock lock
     .....................................................................
     INFO: Lock acquired
     Jul 02, 2014 4:21:32 PM org.apache.karaf.main.Main$KarafLockCallback lockAquired
     INFO: Lock acquired. Setting startlevel to 100
  </code></pre>