I was trying to create a ApplicationRepositorySelector for jboss so that all my log4j.xml settings take effect rather than tweaking the original log4j.xml of jboss. On browsing the LogManager code, it looks like there is a guard object thats taken in during LogManager.setRepositorySelector. A Cursory examination doesnt reflect any use of this outside the class except for error checking within the same. Can someone enlighten me on why this is required and cases when it would be important.