Nagios / Ganglia not working correct after upgrade from 2.1.x to 2.2.x

Hi Folks,
after we upgraded our 11 node cluster from hdp-2.1.x to 2.2.x we don’t get any values for ‘memory usage’, ‘network usage’, ‘cpu usage’ and ‘cluster load’ on the dashboard anymore. I searched your documentation without luck. All services are up and running. Also we’re able to browse Ganglia web ui. In the nagios web ui we have a lot of warnings, even the services are running. What can we do to fix the problem? Please let me know which information you need to help.