Hi, We're facing a strange problem here with Tomcat 5.5.7 When it is running for a while, the network just hangs: it doesn't even reply to ping requests and netstat blocks after showing three or four results. It happens even when Tomcat doesn't receive any request. Then, if we stop Tomcat, the server starts replying to the ping requests. Same if we access our webapp from the server (using 'localhost' in the url). I've never seen something like that. It's making us crazy. Any help or any idea about the reason for this will be greatly appreciated. Thanks, Jean-Pol.