Troubleshooting Compute host name change detection

If you start the Compute service (nova) and your Compute host detects a name change, you receive the following error message:

Found 7 instances on hypervisor but no ComputeNode record exists with host compute01.example.com node compute01.example.com; potential rename detected - aborting startup

To recover from this error, you must know the reason for the change of th...