"dward" wrote : I don't see how using ConcurrentHashMap would be any different than Collections.synchronizedMap(new HashMap()). So it would still open the door for multiple calls to request.getLocalName(). Wrong issue. "dward" wrote : I also don't want to use oswego classes if not necessary. Sorry, why do you need to use oswego? ConcurrentHashMap is in java.util.concurrent as of jdk1.5. Kev View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4269523#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...