yes.. there is a reason. If you restart the server, the IDSequence (LastID) is captured from the Journal. After restart a producer would be generating duplicated IDs. My first option to fix that was to read the last page only, but then I realized that under load you could have those IDs recorded out of order (due to transactions for instance) The best option then was to not generated IDs at all while on Paging. Paging is a buffer working as a client-producer, so that wasn't a problem. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4178081#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...