Hi everyone, I'm struggling with an weird issue on logback I've settup programaticly a rollingFileAppender like in this stackoverflow thread : Setting Logback Appender path programmatically <http://stackoverflow.com/questions/3803184/setting-logback-appender-path-programmatically> But the current log file is not removed so I've got 5 archive Plus the complete log file that is still being populated. and the archives are recalculated at every line written here is the extract of code that instantiates the appender : RollingFileAppender<ILoggingEvent> rfAppender = new RollingFileAppender<>(); rfAppender.setFile(f.getAbsolutePath()); rfAppender.setName(name); rfAppender.setContext(loggerContext); FixedWindowRollingPolicy rollingPolicy = new FixedWindowRollingPolicy(); rollingPolicy.setContext(loggerContext); // rolling policies need to know their parent // it's one of the rare cases, where a sub-component knows about its parent rollingPolicy.setParent(rfAppender); rollingPolicy.setFileNamePattern(f.getAbsolutePath() + ".%i"); rollingPolicy.start(); SizeBasedTriggeringPolicy<ILoggingEvent> triggeringPolicy = new ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy<>(); triggeringPolicy.setMaxFileSize("5MB"); triggeringPolicy.start(); PatternLayoutEncoder encoder = new PatternLayoutEncoder(); encoder.setContext(loggerContext); encoder.setPattern("%d{dd/MM/yyyy HH:mm:ss.SSS} | %-10.10thread | %-20.20logger{0} | %-5level : %msg%n"); encoder.start(); rfAppender.setEncoder(encoder); rfAppender.setRollingPolicy(rollingPolicy); rfAppender.setTriggeringPolicy(triggeringPolicy); rfAppender.start(); logbackLogger.addAppender(rfAppender); the logback version used : ch.qos.logback: logback-classic: 1.1.3 It's running on Windows I really don't know why this happened If anyone have a hint on this behavior? Thank you for your time, Regards, Pierre LEROUGE