Error - "Could not compose a RT vApp for vApp replication with ID 'C4VAPP-ID'. while creating new replications in VCDA.

Products

• VMware Cloud Director

Issue/Introduction

• When attempting to create a new protection replication for a client's vApp, the deployment fails midway with the error:

"Could not compose a RT vApp for vApp replication with ID 'C4VAPP-ID.'"

• Additionally, you may encounter the following error:

"Unable to connect to vCenter '######-####-####-####-##########.

Environment

VMware Cloud Director Availability 4.7.3

Cause

The issue is caused by expired certificates for the tunnels between the two sites. This can lead to a failure in establishing secure communication, causing the vApp replication process to fail.

Resolution

• Replace the service certificate for both sites.
• Reconfigure the tunnels to the manager.
  • In a Web browser, go to https://Appliance-IP-Address/ui/admin.
  • Login using root.
  • In the left pane under Configuration, click Settings.
  • Under Service Endpoints next to Tunnel Service address, click Edit.
  • In the Tunnel Service Settings window, click Apply.
  • Verify the thumbprint and accept the new Tunnel Service SSL certificate.

• Pair the two sites.

Additional Information

For more information on how to regenerate tunnel certificate in vCDA follow the document motioned - https://techdocs.broadcom.com/us/en/vmware-cis/live-recovery/cloud-director-availability/4-6/availability-admin-guide-4-6/vcav-administration-in-the-cloud/certificates-management/replacing-vcav-certificates.html