Cannot Power On VCLS VM's on a New vSphere Cluster

Products

• VMware vCenter Server

Issue/Introduction

Following upgrade/deployment of ESXi hosts 8.0U3 vcls vms appear but do not power on, 

vcls vm's show as in a powered of state with all options greyed out.

In the UI you see the vcls vm cycle from appearing on the host to disappearing.

 By checking the infravisor.log located at /var/run/log/infravisor.log on the ESXi host you see the following error:

0000-00-00T00:00:00Z No(5) infravisor[7488117]: time="0000-00-00T00:00:00Z" level=error msg="unexpected fault: &{{{{<nil> [{{} msg.featurecompat.requirement.number.mismatch [{{} 1 cpuid.mwait} {{} 2 0} {{} 3 1}] Feature 'cpuid.mwait' was 0, but must be 1.} {{} msg.moduletable.powerOnFailed [{{} 1 FeatureCompatLate}] Module 'FeatureCompatLate' power on failed. } {{} msg.vmx.poweron.failed [] Failed to start the virtual machine.}]}}} Feature 'cpuid.mwait' was 0, but must be 1.} taskerror: Feature 'cpuid.mwait' was 0, but must be 1." VM-OP=PowerOn namespace=vcls pod=vcls-********-****-****-****-************ uid=***

Environment

ESXi 8.0U3

Cause

Missing mwait feature on physical host bios.

Resolution

Please enable cpu mwait feature on the server.

For more information see:

https://knowledge.broadcom.com/external/article/390674/vcls-vms-unable-to-power-on-with-no-host.html