Hi, Easy question (I hope !) We are using Tomcat for an ecommerce application (based on Servlets) , and I need to know the number of concurrent Sessions at an specific time, without needing to use any API to add code to our existing application . Is there any way to issue a command on the console, that gives me the number of concurrent sessions, (in the same way I am able to know the number of concurrent threads on Apache ws ?). (I saw other answers to this issue like "create an object that implements httpSessionBindingListener and add this same object to all the sessions that are created"), but I cannot modify the application, so I cannot use such a solution. I will really appreciate help on this. Many thanks in advance. Jose.