I have developed a small application based on java (mysql,jdk 6, tomcat 6). I have hosted it online, but we have issues with the login. we are able to login sometimes.. but sometimes the login fails. when it happens we have to ask the vendor to restart the server from his end, and few mins after server restart, we are able to log in. The next day we face the same issue and we have to ask them again for server restart... plz suggest something