Random domains disappear from Team Center Health Cards and App Map.
When this happens, the Health Cards show "No Data" for a Production environment. This should not be possible, because when customer goes to the production application in the investigator console, they see lots of activity in the agent.
It is happening to random application.
The lone solution is to restart the collector.
This is a performance problem as the customer has lot of monitored metrics .
Install the APM 10.5.1 HF 20 patch .