A Foglight Management Server (FMS) was restarted and the Agent Hosts area doesn't list the Agent Managers (FglAM) that are currently running.
The FglAM has the following message in the log:
"The upstream server indicated that the service we are connection at to http://foglight:8080/catalyst-glue-service/message is temporarily unavailable, possible due to an upgrade in progress. The request will be retried at a later time. Received response code 503. Extra info: There has never been a successful connection to this upstream hosts. 923 connection failures so far..
Received HTTP code: 503 from remote host connecting to URL http://foglight:8080. Reason: The FglAM Adapter is not currently activated. The request cannot be processed."
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