Alarm generated by NSX Application Platform Health with following information.
Description: NSX Application Platform node <node-name> is not running.
However, when you check the node on the vCenter, it is running without any issues. Also there is no impact to the current functioning of NAPP services.
When you login to the NSX Manager CLI with root access and execute the below command, all the nodes would be in "Ready" state.
napp-k get nodes -owide
NSX Application Platform 4.2
Manually resolve the alarm on the NSX and observe for a day or two.
If the alarm does not re-appear, then we could say that the it was a stale alarm.
If the alarm pops backs up, please contact Broadcom support for further guidance.