Just wanted to let you know we are also having the same issue... Running JBoss 4.04GA on CentOS 4.4 using the included red hat run script (running JBoss as a service). The problem happens about twice a month for us on the server which is on all the time. On another spot in the forums and from this link: http://davidbolton.net/blog/?p=21 it looks like some people have had success adding the -Xrs option to their JAVA_OPTS in run.conf. We are just trying that now, will hopefully post in a couple months if we've avoided the problem since. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4076555#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...