Error: "Exception occurred while deploying and attaching network to vApp edge... java.lang.NullPointerException" when updating VM in Cloud Director UI

Products

• VMware Cloud Director

Issue/Introduction

• You get notified that VM's NICs were reset in VCD (no network or IP addresses, disconnected NIC) and a NIC is no longer assigned to the vApp
• Adding or modifying the network assigned to a VM NICs fails with "java.lang.NullPointerException" error
• The following error is found in the cloud director debug logs: 

Exception occurred while deploying and attaching network to vApp edge <VAPP_NETWORK_NAME> with id <VAPP_NETWORK_ID>.

Environment

VMware Clou Director 10.5.1.1

Cause

The network is not pointing to any valid Real Network and not associated to any other object in the Org VDC.

Resolution

To resolve the issue to contact Broadcom Support for guidance on optimization of the database and note this Article ID (376122) in the problem description. For more information, see Creating and managing Broadcom support cases