I noticed this morning that the OC indicated there were 0 Monitored Devices in the last 30 minutes. Looking at the status of the hub probe, I don't see a queue for the data_engine that I normally expect to see. I am still getting alerts from UIM, and I see other queues filling and emptying.
I don't seem to be able to generate any metric views for groups or devices.
Release : 20.3
Component : UIM - DATA_ENGINE
Check to make sure the data_engine is still deployed to the primary hub, and if missing deploy it.
The queue can be manually created:
IM console > primary hub > configure > Queues > New
OK > Apply
Then at the hub configure Status tab check the queue. Initially it will be yellow until data_engine has finished initialization.