I'm encountered a strange error. When I bind JBoss instance to 0.0.0.0 address instead of a fixed ethernet address, node gets registered in mod_cluster, shows in mod_cluster-manager, but every request to registered contexts throws 503 error. httpd error log: [Fri Aug 07 03:21:05 2009] [error] (111)Connection refused: proxy: ajp: attempt to connect to 0.0.0.0:8009 (0.0.0.0) failed [Fri Aug 07 03:21:05 2009] [error] ap_proxy_connect_backend disabling worker for (0.0.0.0) [Fri Aug 07 03:21:15 2009] [error] proxy: ajp: disabled connection for (0.0.0.0) [Fri Aug 07 03:21:25 2009] [error] proxy: ajp: disabled connection for (0.0.0.0) This looks like a bug for me, because many administrators are binding JBoss to 0.0.0.0. -- Marek Goldmann JBoss by Red Hat