Created 07-27-2017 03:12 PM
it's hard to tell with provided information.
plz provide more details like
Ambari server version:
HDP Stack version:
Is mysql up and running?
which sql connector are you using? run below command and provide output
ls -lrt /usr/share/java/mysql-connector-java*
copy last 20 lines error message from amabri-server log, run below command for that.
tail -20 /var/log/ambari-server/ambari-server.log