Thanks for reaching to Cloudera community. We may need some more logs in order to find out what went wrong.
Is Host Monitor service running and showing as green on CM UI? Could you please go to CM UI > Cloudera Management Service > Host Monitor > Log Files and provide us the role log, stdout and sterr logs? See below screenshots for where it exists on the UI.
Also, make sure the host with Host Monitor installed is healthy and heartbeat to CM correctly.
Li Wang, Technical Solution Manager
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