I have been experiencing a weird issue with a number of different Virtual servers and a number of different applications running on Virtual servers. It is happening on both Virtuozzo 3.5.1 and Virtuozzo 4.0. Both have latest service patches installed. The issue is intermittent and is not directly related to any action or resource issue on pysical server node. For some reason all web site in Plesk or a standalone IIS server including web application stops serving. VPS can ping with no issue, in fact you can RDP to server and all services are running. RAM on both VPS and physical node are not even close to being overloaded. If you shut down a single Virtual Server on node all sites come back. Has anyone seen same issue??? I surely cannot be the only one with this issue. HELP!!