"logback.statusListenerClass" system property

One may also register a status listener by setting the "logback.statusListenerClass" Java system property to the name of the listener class you wish to register. For example,

java -Dlogback.statusListenerClass=ch.qos.logback.core.status.OnConsoleStatusListener ...

Logback ships with several status listener implementations. OnConsoleStatusListener prints incoming status messages on the console, i.e. on System.out. OnErrorConsoleStatusListener prints incoming status messages on System.err. NopStatusListener drops incoming status messages.

Note that automatic status printing (in case of errors) is disabled if any status listener is registered during configuration and in particular if the user specifies a status listener via the "logback.statusListenerClass" system. Thus, by setting NopStatusListener as a status listener, you can silence internal status printing altogether.

java -Dlogback.statusListenerClass=ch.qos.logback.core.status.NopStatusListener ...