Hi, I am trying to configure logback to launch silently (without outputting verbose information about its configuration). When my configuration file contains: <appender name="file" class="ch.qos.logback.core.FileAppender"> <file>../../../foo.log</file> <append>false</append> <encoder> <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %class{}.%method\(\) - %msg%n</pattern> </encoder> </appender> I don't get any output at startup (good!). When I replace this with: <appender name="file" class="ch.qos.logback.core.rolling.RollingFileAppender"> <file>../../../foo.log</file> <append>false</append> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <fileNamePattern>../../../foo.%d{yyyy-MM-dd}.%i.log</fileNamePattern> <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP"> <maxFileSize>100MB</maxFileSize> </timeBasedFileNamingAndTriggeringPolicy> </rollingPolicy> <encoder> <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %class{}.%method\(\) - %msg%n</pattern> </encoder> </appender> I suddenly get this output: 01:17:17,188 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback.groovy] 01:17:17,189 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback-test.xml] 01:17:17,189 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Found resource [logback.xml] at [file:/C:/Users/Gili/Documents/foo.service/web/target/classes/logback.xml] 01:17:17,379 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - debug attribute not set 01:17:17,391 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.ConsoleAppender] 01:17:17,395 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [stdout] 01:17:17,425 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property 01:17:17,482 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.rolling.RollingFileAppender] 01:17:17,484 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [file] 01:17:17,519 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy - No compression will be used 01:17:17,521 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy - Will use the pattern ../../../foo.%d{yyyy-MM-dd}.%i.log for the active file 01:17:17,523 |-INFO in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@1ea40b04 - The date pattern is 'yyyy-MM-dd' from file name pattern '../../../foo.%d{yyyy-MM-dd}.%i.log'. 01:17:17,523 |-INFO in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@1ea40b04 - Roll-over at midnight. 01:17:17,526 |-INFO in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@1ea40b04 - Setting initial period to Wed Jul 31 01:17:17 EDT 2013 01:17:17,530 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property 01:17:17,531 |-WARN in ch.qos.logback.core.rolling.RollingFileAppender[file] - Append mode is mandatory for RollingFileAppender 01:17:17,533 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[file] - Active log file name: ../../../foo.log 01:17:17,533 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[file] - File property is set to [../../../foo.log] 01:17:17,535 |-INFO in ch.qos.logback.classic.joran.action.LoggerContextListenerAction - Adding LoggerContextListener of type [ch.qos.logback.classic.jul.LevelChangePropagator] to the object stack 01:17:17,537 |-INFO in ch.qos.logback.classic.jul.LevelChangePropagator@23cf4353 - Propagating DEBUG level on Logger[ROOT] onto the JUL framework 01:17:17,542 |-INFO in ch.qos.logback.classic.joran.action.LoggerContextListenerAction - Starting LoggerContextListener 01:17:17,542 |-INFO in ch.qos.logback.classic.joran.action.RootLoggerAction - Setting level of ROOT logger to TRACE 01:17:17,542 |-INFO in ch.qos.logback.classic.jul.LevelChangePropagator@23cf4353 - Propagating TRACE level on Logger[ROOT] onto the JUL framework 01:17:17,542 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [stdout] to Logger[ROOT] 01:17:17,543 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [file] to Logger[ROOT] 01:17:17,543 |-INFO in ch.qos.logback.classic.joran.action.LoggerAction - Setting level of logger [com.foo.Preconditions] to INFO 01:17:17,543 |-INFO in ch.qos.logback.classic.jul.LevelChangePropagator@23cf4353 - Propagating INFO level on Logger[com.foo.Preconditions] onto the JUL framework 01:17:17,543 |-INFO in ch.qos.logback.classic.joran.action.LoggerAction - Setting level of logger [com.foo.ToJsonString] to INFO 01:17:17,543 |-INFO in ch.qos.logback.classic.jul.LevelChangePropagator@23cf4353 - Propagating INFO level on Logger[com.foo.ToJsonString] onto the JUL framework 01:17:17,544 |-INFO in ch.qos.logback.classic.joran.action.LoggerAction - Setting level of logger [com.foo.sql.Session] to INFO 01:17:17,544 |-INFO in ch.qos.logback.classic.jul.LevelChangePropagator@23cf4353 - Propagating INFO level on Logger[com.foo.sql.Session] onto the JUL framework 01:17:17,544 |-INFO in ch.qos.logback.classic.joran.action.LoggerAction - Setting level of logger [com.google.inject.servlet.GuiceFilter] to OFF 01:17:17,544 |-INFO in ch.qos.logback.classic.jul.LevelChangePropagator@23cf4353 - Propagating OFF level on Logger[com.google.inject.servlet.GuiceFilter] onto the JUL framework 01:17:17,544 |-INFO in ch.qos.logback.classic.joran.action.LoggerAction - Setting level of logger [com.sun.jersey.server.impl.ejb.EJBComponentProviderFactoryInitilizer] to WARN 01:17:17,544 |-INFO in ch.qos.logback.classic.jul.LevelChangePropagator@23cf4353 - Propagating WARN level on Logger[com.sun.jersey.server.impl.ejb.EJBComponentProviderFactoryInitilizer] onto the JUL framework 01:17:17,544 |-INFO in ch.qos.logback.classic.joran.action.LoggerAction - Setting level of logger [com.sun.jersey.server.impl.managedbeans.ManagedBeanComponentProviderFactoryInitilizer] to WARN 01:17:17,544 |-INFO in ch.qos.logback.classic.jul.LevelChangePropagator@23cf4353 - Propagating WARN level on Logger[com.sun.jersey.server.impl.managedbeans.ManagedBeanComponentProviderFactoryInitilizer] onto the JUL framework 01:17:17,544 |-INFO in ch.qos.logback.classic.joran.action.LoggerAction - Setting level of logger [com.sun.jersey.server.impl.cdi.CDIComponentProviderFactoryInitializer] to WARN 01:17:17,544 |-INFO in ch.qos.logback.classic.jul.LevelChangePropagator@23cf4353 - Propagating WARN level on Logger[com.sun.jersey.server.impl.cdi.CDIComponentProviderFactoryInitializer] onto the JUL framework 01:17:17,544 |-INFO in ch.qos.logback.classic.joran.action.LoggerAction - Setting additivity of logger [com.sun.jersey.api.container.filter.LoggingFilter] to false 01:17:17,544 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [file] to Logger[com.sun.jersey.api.container.filter.LoggingFilter] 01:17:17,544 |-INFO in ch.qos.logback.classic.joran.action.LoggerAction - Setting level of logger [org.glassfish.grizzly.] to WARN 01:17:17,544 |-INFO in ch.qos.logback.classic.jul.LevelChangePropagator@23cf4353 - Propagating WARN level on Logger[org.glassfish.grizzly.] onto the JUL framework 01:17:17,545 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - End of configuration. 01:17:17,545 |-INFO in ch.qos.logback.classic.joran.JoranConfigurator@7c4d1082 - Registering current configuration as safe fallback point Any idea why RollingFileAppender is producing all this noise? Thanks, Gili