log4j – Page 2 – IT Nursery

What is the significance of log4j.rootLogger property in log4j.properties file? What happens if I don’t use this property?

April 6, 2022 by IT Nursery

Samudra Gupta explains in his book1: The Logger object is the main object that an application developer uses to log any message. The Logger objects acting within a particular instance of an application follow a parent-child hierarchy. If you have the following configuration: log4j.rootLogger=WARN, stdout log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=org.apache.log4j.SimpleLayout log4j.logger.com.me.proj2=INFO This is how the logger hierarchy could end up looking:2 Samudra Gupta … Read more

No appenders could be found for logger(log4j)?

April 4, 2022 by IT Nursery

This Short introduction to log4j guide is a little bit old but still valid. That guide will give you some information about how to use loggers and appenders. Just to get you going you have two simple approaches you can take. First one is to just add this line to your main method: BasicConfigurator.configure(); Second approach is … Read more