There are default settings for the log4j features that are set when the project is initially built.
The log4j property file is found in the project name/WEB-INF/config
directory. This property file sets the log4j features for all models within the project. Within the log4j property file there are 5 priority levels: This set of priorities has the following hierarchy:
DEBUG < INFO < WARN < ERROR < FATAL.
This hierarchy implies that DEBUG is the most verbose and FATAL is the most restrictive. This means that if you set the priority level at ERROR, it will enable the program to write all messages with a priority level of ERROR or FATAL to the log. But it will not write any messages that have a priority less than ERROR (namely DEBUG, INFO, and WARN). The default setting for all IBM® WebSphere® Portlet Factory projects is WARN, except for the log file used for the category "debug tracing", which defaults to INFO.
Parent topic: Changing the default logging level