You must stop and restart the Ambari Service.
$ sudo ambari-server stop
You should see the following response:
Using python /usr/bin/python
Stopping ambari-server
Ambari Server stopped
Restart the Ambari Service:
$ sudo service ambari-server restart
You should see the following response:
Using python /usr/bin/python
Restarting ambari-server
Using python /usr/bin/python
Stopping ambari-server
Ambari Server is not running
Using python /usr/bin/python
Starting ambari-server
Ambari Server running with administrator privileges.
Organizing resource files at /var/lib/ambari-server/resources...
Server PID at: /var/run/ambari-server/ambari-server.pid
Server out at: /var/log/ambari-server/ambari-server.out
Server log at: /var/log/ambari-server/ambari-server.log
Waiting for server start....................
Ambari Server 'start' completed successfully.