There are instances where Cloud Director will timeout waiting on vCenter whilst performing a "Relocate VM" or "import VM" operation.
In those instances, you may see an error such as :
The vCenter Server operation ([vcId=########-###-###-######, moref=task-#####]) has taken too long (28800.00 seconds). VMware Cloud Director considers this operation timed out.
VMware Cloud Director 10.x
This occurs as the task takes way longer than the pre-defined timeouts on Cloud Director.
Resolution involves making modifications to Cloud Director Database. Contact technical support and note this Knowledge Article ID (320498) in the problem description. For more information, see How to Submit a Support Request