/var/log/upgrade-coordinator/upgrade-coordinator.log
INFO http-nio-127.0.0.1-7442-exec-4 UpgradeCoordinatorFacadeImpl 486863 SYSTEM [nsx@6876 comp="nsx-manager" level="INFO" subcomp="upgrade-coordinator"] Component: HOST, status: FAILED, % complete: 0.0, details: Upgrade vibs operation failed to complete within alloted time., canSkip: false
hostupdate.vmware.com
Note: The preceding log excerpts are only examples. Date, time, and environmental variables may vary depending on your environment.
Lifecycle Manager cannot download the necessary patches online to remediate compliance to the Host images.
In turn, the NSX upgrade of ESXi hosts fails to complete because of the above condition.
This behavior is documented in the following article: Error: A general system error occurred: Failed to download VIB(s): Error: HTTP Error Code: 403, vLCM fails to download the ESXi patches and images from online repositories
After remediating the Lifecycle Manager compliance, retry the NSX upgrade.