hello Koos I don’t know how to change the logging level itself, but I assume that what you actually want to do is log these WARN messages with a configuration that has the rootLogger configured at ERROR level. If that’s the case, you can simply declare a separate logger for the packages of that third-party library. In Groovy configuration that gives us: import ch.qos.logback.classic.encoder.PatternLayoutEncoder import ch.qos.logback.core.FileAppender import static ch.qos.logback.classic.Level.* appender("someAppender", FileAppender) { file = "/var/log/test/rootLog.log" encoder(PatternLayoutEncoder) { pattern = "%date{yyyy-MM-dd HH:mm:ss,SSS} [%thread] %-5level - \\(%logger\\) - %message%n" } } root(ERROR, ["someAppender"]) // ======================================================= // This is the logger that will allow WARN messages of your third-party library to log its WARN messages (and above) to the same appender the rootLogger is using. // "logger(...)" documentation can be found here: http://logback.qos.ch/manual/groovy.html // ======================================================= logger("com.thirdparty.lib", WARN, ["someAppender"], false) Best regards Andrew Bourgeois From: K.O.Gadellaa@rn.rabobank.nl Sent: Friday, 07 September, 2012 18:24 To: logback-user@qos.ch Subject: [logback-user] Modifying a logging events' level Hi, I'm in the situation where a 3rd party code logs some content at a certain level, but I want that log to be a different (higher) level. E.g: in my log: WARN : Connection to XYZ failed. But I want: ERROR: Connection to XYZ failed. Is there a way to do this with logback? (couldn't figure it out… maybe with a separate appender?) Regards, Koos Gadellaa ====================================================== Rabobank disclaimer: http://www.rabobank.nl/disclaimer -------------------------------------------------------------------------------- _______________________________________________ Logback-user mailing list Logback-user@qos.ch http://mailman.qos.ch/mailman/listinfo/logback-user