I have an OpsCenter 5.0 instance running and 10 agents connected. The agents are in 2 regions in AWS, so everything is using external addresses to communication. All the necessary ports are open, and in fact, the OpsCenter dashboard says "All agents connected". I can also click on any of the nodes for details, and all the stats seem to be updating normally.
My only problem is that all the graphs show "No Data". The strange thing is that they seemed to be working for a few minutes after I first set it up, but then stopped recording any data.
I have restarted the server and all agent processes, but that didn't help. Thanks in advance for any suggestions or ideas!