Clustered (4.5) Server May Lock into Busy State
A clustered 4.5 Server may lock into busy state and will not serve content. There is a yellow exclamation point in ClusterCATS Explorer over the virtual server. When ClusterCATS cannot get the load value for a web server, it marks the server busy.
For more information, see http://www.allaire.com/Handlers/index.cfm?ID=14020.