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