*Hello after i restart my centos server i get a blank Page and when i check
out my log files i have ths error : *
*Mar 7 05:42:16 localhost server: 05:42:16.838 [http-bio-8080-exec-3]
ERROR o.a.g.rest.RESTExceptionMapper - Unexpected internal error:Mar 7
05:42:16 localhost server: ### Error querying database. Cause:
com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link
failureMar 7 05:42:16 localhost server: The last packet sent successfully
to the server was 0 milliseconds ago. The driver has not received any
packets from the server.Mar 7 05:42:16 localhost server: ### The error may
exist in org/apache/guacamole/auth/jdbc/user/UserMapper.xmlMar 7 05:42:16
localhost server: ### The error may involve
org.apache.guacamole.auth.jdbc.user.UserMapper.selectOneMar 7 05:42:16
localhost server: ### The error occurred while executing a queryMar 7
05:42:16 localhost server: ### Cause:
com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link
failure*
