Host prechecks through SDDC manager are failing during EMM dry run validation due to a VM fault.

Products

• VMware SDDC Manager

Issue/Introduction

• Error description:
  
A VM faults were found while performing EMM dry run enter in maintenance mode validation


• Remediation steps suggesting an issue with a Virtual machine preventing the migration to another host like the example below referring to a vDS network configuration issue:
  
  Currently connected network interface 'Network validation adapter 1' uses network 'DVSwitch: 'xx xx xx xx xx xx xx-xx xx xx xx xx xx xx xx' which is not accessible.

Environment

VMware SDDC Manager 4.x
VMware SDDC Manager 5.x

Cause

This error message suggests there are virtual machines pinned to a host that prevents entering maintenance mode.

Resolution

Verify Virtual Machine configuration running on the host.

As workaround manually power off the VM during the upgrade.

Additional Information

Place an ESXi Host in Maintenance Mode in the VMware Host Client