My immediate thought it is there is some packet being received that has a bad size value, which is why a 1.6GB buffer might have been allocated. Maybe you could patch the code that allocates that array to throw an exception when a certain size limit is reached? I'd also try to run tcpdump and try and capture the offending packet if possible. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4136239#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...