Error: "HA Admission Control (HAC) is disabled for cluster” when trying to update VMtools through vSphere Lifecycle Manager

Products

• VMware vCenter Server

Issue/Introduction

• When trying to update VMware tools in the vCenter you encounter the error below

  HA Admission Control (HAC) is disabled for cluster

  

• When checking settings for HAC, you confirm it is enabled
• There are errors seen in the /var/log/vmware/vmware-updatemgr/vum-server logs as below:

  • Reason = "vLCM Task failed, see Error Stack for details."
    msg = "{
    "data": null,
    "error_type": "ERROR",
    "messages":
    "args": [],
    "default_message": "UMDS Depot not found.",
    "id": "com.vmware.vcIntegrity.lifecycle.depots.umds.NotFound"
    

Environment

VMware vCenter Server 8.X

VMware vSphere ESXi 8.X

VMware vCenter Server 7.X

VMware vSphere ESXi 7.X

Cause

• UMDS Shared Repository URL is not working

Resolution

• Reboot the NIC on the UMDS Repository side