Upgrade Pre-check Failure – Error while checking if host reboot is pending from a previous action

Products

• VMware NSX

Issue/Introduction

During the upgrade pre-check, the process failed for one of the hosts. The following error was displayed:

“Error while checking if host reboot is pending from a previous action. Please check the configuration state of host <masked-hostname>, <masked-uuid> and ensure that services are operating normally.”

Environment

VMware NSX

Cause

This error occurs when the system detects that the host may still be in a pending reboot state due to:

• A previous patch, update, or configuration change that required a reboot.

• Host services not having restarted correctly after a previous action.

As a result, the pre-check validation cannot proceed.

Resolution

1. Verify Host State

   • Log in to the affected host (<masked-hostname>).

   • Check if the system indicates a pending reboot. Run following CLI command on the host as root to verify:
     vim-cmd hostsvc/hostsummary|grep -i reboot; If rebootRequired is set to true then the host reboot is pending.
     
     

2. Check Services

   • Confirm that all essential services (management, networking, and storage) are running normally.

3. Perform a Manual Reboot (if required)

   • If a pending reboot is confirmed or services appear unstable, reboot the host manually.

   • Allow the host to come back online and verify that services are restored.

4. Re-run the Upgrade Pre-check

   • If the host is stable, repeat the upgrade pre-check to confirm successful validation.