Hi, It is not an issue with hdp_mon_ganglia_addons. That does not need to be installed.
To confirm: the charts on the Dashboard (network, cpu, disk, load), on the Services pages and on the Host pages are not showing. They are all saying “no data available”?
Can you confirm:
1) On all machines, you see gmond processes running. ps -ef | grep gmond
2) And on the machine hosting the ganglia server, you see the gmetad process running. ps -ef | grep gmetad
3) All machines in your cluster are the same time? ntpd running?
4) The machine you are accessing Ambari Web with (via a browser), how close is that time to the time of the machines in your cluster?