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Log messages largely appear in the JBoss log, <jboss-dir>/server/default/log/server.log. Bedework uses log4j for most application logging. The JBoss log4j configuration can be found in <jboss-dir>/server/default/conf/jboss-log4j.xml. It is configured to maintain a rolling log file (server.log) and also append output to the console.
If you are familiar with log4j, you can also dynamically change logging properties within the JBoss jmx-console, http://localhost:8080/jmx-console/ in jboss.system -> service=Logging,type=Log4jService