"clebert.suconic(a)jboss.com" You also need libaio: on the U word OS aptitude install libaio or On Fedora yum libaio [/quote wrote : | | Well... you're libaio tests (apart from those known two) pass for me, so I must have libaio installed already. | | It's just when I start a server it doesn't recognise this and uses NIO instead. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4149405#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...