Hi ! I use below settings and deploy to Glassfish. Logback.xml is not inside the warfile, but I copy it to the classes folder under /domain/application/... <configuration scan="true" scanPeriod="20 seconds" debug="true"> <statusListener class="ch.qos.logback.core.status.OnConsoleStatusListener" /> When deploying or restarting the app the config is read .. 16:02:41,826 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - Setting ReconfigureOnChangeFilter scanning period to 20 seconds 16:02:41,826 |-INFO in ch.qos.logback.classic.turbo.ReconfigureOnChangeFilter@12a0ca7 - Will scan for changes in [[/home/sven/glassfish3/glassfish/domains/domain1/applications/HelloLog/WEB-INF/classes/logback.xml]] every 20 seconds. 16:02:41,826 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - Adding ReconfigureOnChangeFilter as a turbo filter 16:02:41,828 |-INFO in ch.qos.logback.core.joran.action.StatusListenerAction - Adding status listener of type [ch.qos.logback.core.status.OnConsoleStatusListener] .. but it does not re-read on any change, only restarting the app will read changes like debug-level change. Any ideas ? Thanks ! Sven