Oops! An error occurred while trying to connect to the database. This could happen if the database does not contain any cancer studies. Got Database Exception: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.Please try again or send email to cbioportal at googlegroups dot com if this is any error in this portal.