WebLogic logging configuration

Logging in the Weblogic server is primarily configured by two steps:

Step one: Enable adflogger

Navigate to the domain home bin directory (usually ${MW_HOME}/user_projects/domains/${DOMAIN_NAME}/bin) and edit setDomainEnv.sh. Append the following lines at the end of the file:

JAVA_OPTIONS="${JAVA_OPTIONS} -Djbo.debugoutput=adflogger -Djbo.adflogger.level=FINEST"
export JAVA_OPTIONS

Step two: Configure logging

Navigate to the server’s configuration directory (usually ${MW_HOME}/user_projects/domains/${DOMAIN_NAME}/config/fmwconfig/servers/${SERVER_NAME})
Edit the logging.xml file, either with a text editor or by loading it into JDeveloper (which is more handy since it allows to edit the file with an editor specifically designed for logging configuration files).
Configure the packages from which you want to see logging output, e.g. to see all JBO related output set oracle.jbo to the level "FINEST"
Save the file

Restart the weblogic server. You will now see the logging output in the file ${MW_HOME}/user_projects/domains/${DOMAIN_NAME}/servers/${SERVER_NAME}/logs/AdminServer-diagnostic.log