The DRIVE\jboss-4.0.5.GA\server\default\log files can become large due to logging.
To reduce the size of the JBoss Log:
First, shut down JBoss. You will need to modify the file DRIVE\JBossDir\server\default\conf\log4j.xml.
Note, please back it up before doing any editing.
Search for section:
<appender name="FILE" class="org.jboss.logging.appender.DailyRollingFileAppender">
Inside here are 'param' tags. By default there is a param tag for 'Threshold' in the FILE appender, but there is one for the CONSOLE appender.
If this tag does not exist, then add it:
<param name="Threshold" value="ERROR"/>
If the Threshold tag exists and has a different value than ERROR, change this value to ERROR or WARN and save the file. Be certain it is entered prior to the </appender> tag but not within another matched pair.
More details can be found on the JBoss site at http://docs.jboss.org/process-guide/en/html/logging.html.
In this method, the log file size will be drastically reduced. It will only show the ERROR messages. WARN would a bit more verbose but not the level of detail by default.