Logging for Web Applications and Web Services
Log4j will be used to do logging in web applications (such as the COSMOS UI) and web services (data managers). Information about log4j can be found at the log4j website.
To configure a web applciation to use log4j, we need a configuration file called log4j.properties in the classpath, usually put under WebContent/WEB-INF/classes. Axis2.jar comes with a log4j.properties that contains some default settings.