Contents of `config/application.yml` : ``` logging: config: config/logback.xml ``` If launched simply with: (this doesn't work, all I get is Spring Boot default logging) java -Djava.awt.headless -jar satukancinta-server-3.0.0-SNAPSHOT.jar However this works: java -Djava.awt.headless -Dlogging.config=config/logback.xml -jar satukancinta-server-3.0.0-SNAPSHOT.jar So the `logging.config` configuration in `config/application.yml` is useless. Spring Boot 1.5.4. Probably related to #7099.