What do you mean by "not detected the lost of connection"? Does JBoss hang? Does the database call return immediately without any data? If JBoss hangs, then it appears that the connection is not timing out. I believe that timing out a connection is a function of the socket layer, which is part of the operating system. Therefore you should post this question on the Unbuntu forum - how do you configure socket timeout. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4067075#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...