"An error occurred during the initialization. Accessing the application through an unsupported public URL or poor connectivity might cause this error" when accessing provider portal for Cloud Director

Products

• VMware Cloud Director

Issue/Introduction

When attempting to access the provider portal the error is received:
"An error occurred during the initialization. Accessing the application through an unsupported public URL or poor connectivity might cause this error."

PostgreSQL availability in the VAMI will show all three cells as healthy for a HA cluster.

Checking service availability at https://<cell IP or FQDN>/cloud/server_status will show the primary cell's vmware-vcd service as down.

Upon further review the CPU usage of the primary cell may be spiking. Restarting the vmware-vcd service results in the following error in the /opt/vmware/vcloud-director/logs/cell-runtime.log: 
"FATAL    | Module: HTML5 Cell Application | ModuleRegistry                 | Error in module: "HTML5 Cell Application"; Bean: vcdSecuredWebappConfiguration, Message: Error creating bean with name 'vcdSecuredWebappConfiguration': Unsatisfied dependency expressed through field 'sessionFilter';"

Environment

VMware Cloud Director 10.x

Cause

The cell is undersized for the environment. The resources need to be expanded according to https://techdocs.broadcom.com/us/en/vmware-cis/cloud-director/vmware-cloud-director/10-5/vmware-cloud-director-installation-and-upgrade-guide-10-5/deployment-uprade-and-administration-of-the-vcd-appliance-install/deployment-and-initial-configuration-of-your-vcd-appliance-install/vcd-appliance-sizing-guidelines-install.html.

The steps to resize are here: https://knowledge.broadcom.com/external/article/387075/recommended-procedure-for-resizing-cloud.html.

There may be similar or other errors that could result in the same error message in the portal, and it would require a different resolution.

Resolution

As a workaround we can failover the database if the primary cell is the cause. 

1. Access the VAMI of the primary cell in a web browser at https://<Cell IP or FQDN>:5480. Log in as root.
2. Switch to one of the secondary database appliances using the "Switchover" button in the cluster view.
3. After the operation successfully completes reboot the primary appliance.

Then proceed to correctly size the appliances afterwards.