For using slf4j, you need to have a configure file, as it showed in the message, default it's config/java.util.logging.properties, so, you can add this file to this path or try to configure slf4j: https://www.slf4j.org/docs.html
Ignite slf4 logger constructor also have another constructor - new Slf4jLogger(Logger logger). Evgenii -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/
