In the trace you have something like: +++ [Mon Jan 02 21:15:42 2012] [debug] mod_manager.c(1653): manager_trans REMOVE-APP (/*) [Mon Jan 02 21:15:42 2012] [debug] mod_manager.c(2296): manager_handler REMOVE-APP (/NODE_COMMAND) processing: "JVMRoute=cluster1" [Mon Jan 02 21:15:42 2012] [debug] mod_manager.c(1133): process_node_cmd 4 processing node: 1 [Mon Jan 02 21:15:42 2012] [debug] mod_manager.c(2339): manager_handler REMOVE-APP OK [Mon Jan 02 21:15:42 2012] [debug] mod_proxy_cluster.c(641): update_workers_node starting [Mon Jan 02 21:15:42 2012] [debug] mod_proxy_cluster.c(656): update_workers_node done [Mon Jan 02 21:15:42 2012] [debug] mod_proxy_cluster.c(568): remove_workers_node (helper) 0 cluster1 [Mon Jan 02 21:15:42 2012] [debug] mod_proxy_cluster.c(641): update_workers_node starting [Mon Jan 02 21:15:42 2012] [debug] mod_proxy_cluster.c(251): Created: reusing worker for ajp://192.168.40.129:8109 [Mon Jan 02 21:15:42 2012] [debug] mod_proxy_cluster.c(353): proxy: initialized worker 1 in child 3914 for (192.168.40.129) min=0 max=25 smax=25 [Mon Jan 02 21:15:42 2012] [debug] mod_proxy_cluster.c(411): Created: worker for ajp://192.168.40.129:8109 1 (status): 129 [Mon Jan 02 21:15:42 2012] [debug] mod_proxy_cluster.c(656): update_workers_node done [Mon Jan 02 21:15:42 2012] [debug] mod_proxy_cluster.c(568): remove_workers_node (helper) 0 cluster1 +++
A few 404 may happens while shutdown of node.