Replying to myself as i found the solution over the web. I had to call LoggerContext reset() and then ContextInitializer autoConfig() for the logging to be effective again after LoggerContext stop() & start(), as described here : http://stackoverflow.com/a/3810936 Mathieu ----- Message d'origine ----- De : Mathieu Stempell Envoyés : 20.02.13 15:28 À : logback-dev@qos.ch Objet : [logback-dev] stop() and start() on LoggerContext Hello, When i call start() method on LoggerContext after i called stop(), i doesn't log anything new in the output files : ----------- LoggerContext loggerContext = (LoggerContext)LoggerFactory.getILoggerFactory(); LoggerFactory.getLogger(AbstractTest.class).info("test info before stop"); // logs, ok loggerContext.stop(); LoggerFactory.getLogger(AbstractTest.class).info("test info between stop and start"); // doesn't log, ok loggerContext.start(); LoggerFactory.getLogger(AbstractTest.class).info("test info after start"); // doesn't log, why??? ----------- Is it normal or not? Thanks in advance for your anwser. Mathieu