I want to control the logging of my application by including a suitable log4j.xml in war's WEB-INF/classes/. Initial attempt of just including the xml file in the war failed, as JBoss' own configuration file in conf/ did override my settings. Using instructions on

http://www.jboss.org/wiki/Wiki.jsp?page=Logging

I was able to get the correct results. My question is, what exactly do settings

<class-loading java2ClassLoadingCompliance="false">
<loader-repository>
log4j.test:loader=log4j.war
<loader-repository-config>java2ParentDelegation=false</loader-repository-config>
</loader-repository>
</class-loading>

do, and do they have any unwanted side-effects?