"Check for recommended images" task shows "Cluster is up to date! There are no new recommended cluster images available for this cluster" even though there are patches available for update

Products

• VMware vCenter Server

Issue/Introduction

• "Check for recommended images" option completes successfully in vLCM, and shows "Cluster is up to date", even though there are patches available for update.
  
  
• Logs on vCenter Server /var/log/vmware/vmware-updatemgr/vum-server/vmware-vum-server.log shows entries similar to: 

"vcgLink": null
"notes": [
  {
    "id": "com.vmware.vcIntegrity.hcl.report.unknownDevice.summary",
    "translatable": "Could not determine the device's compatibility because it was not found in the VMware Compatibility Guide. Verify compatibility by searching for this device using the device IDs below. Contact the device vendor to verify compatibility."
  }
]

YYYY-MM-ddTHH:MM:SS.786Z info  vmware-vum-server[3275111] [Originator@6876 sub=ClusterHclValidateTask] [Task, 505] Task:com.vmware.vcIntegrity.lifecycle.ClusterHclValidateTask Finalizing Task
YYYY-MM-ddTHH:MM:SSZ error vmware-vum-server[3275111] [Originator@6876 sub=TelemetryError] [PManTelemetryEvents 171] Notifications is empty.

Environment

vCenter Server 9.x

Cause

This issue can occur when vCenter Server is unable to establish connectivity to the Broadcom software repository while new updates or software versions are available.

Resolution

To resolve this issue, refer Public URL list for SDDC Manager, VCF Downlod Tool, Async Patch Tool which outlines all the required URLs that must be accessible to enable online functionality in a VCF environment.

Additional Information

Check for Recommended Images

By using recommended images for your clusters or standalone hosts, you ensure that your environment runs the latest verified software. Although vSphere Lifecycle Manager generates image recommendation automatically when the cluster or the host changes or when new software is available in the vSphere Lifecycle Manager depot, you can manually check for recommendations at any time.

• Verify that remediation is not running for the cluster or the standalone host.
• Verify that you have connection to the Internet.
• Verify that you have the proper privileges. See vSphere Lifecycle Manager Privileges For Using Images

For more details refer Check for Recommended Images section under: vSphere Lifecycle Manager Recommended Images.