It seems to me that Region#markNodeCurrentlyInUse() does not really do what it is supposed to do. Basically, it adds an event to the queue. And what can happen is that 4 seconds later (say, if event queue processing is every 4 seconds), is that the node can disappear after this method is called. Doesn't this make this method fairly useless? Shouldn't there just be a method on a Node to prevent eviction? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4003044#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...