Comment 2 for bug 1400269

I can confirm this error on a very recent nova+ironic. While some nodes were failing deploy, I deleted and re-created the flavor to have less disk requirement, and now I cannot delete the instances:

+--------------------------------------+---------------------------------------------------------------------------------------------+
| Property | Value |
+--------------------------------------+---------------------------------------------------------------------------------------------+
| OS-DCF:diskConfig | MANUAL |
| OS-EXT-AZ:availability_zone | nova |
| OS-EXT-SRV-ATTR:host | seed |
| OS-EXT-SRV-ATTR:hypervisor_hostname | 772af6ac-d053-47cf-88b5-3cce94191bb4 |
| OS-EXT-SRV-ATTR:instance_name | instance-00000001 |
| OS-EXT-STS:power_state | 0 |
| OS-EXT-STS:task_state | deleting |
| OS-EXT-STS:vm_state | error |
| OS-SRV-USG:launched_at | - |
| OS-SRV-USG:terminated_at | - |
| accessIPv4 | |
| accessIPv6 | |
| config_drive | |
| created | 2014-12-11T10:27:04Z |
| fault | {"message": "Flavor 7 could not be found.", "code": 404, "created": "2014-12-11T10:37:51Z"} |
| flavor | baremetal (82f959f5-b20e-44b2-9604-f68abc19e214) |
| hostId | e7fd3fa395a116811e038357c0c1fc0f37af09d8c600294e1631a1d6 |
| id | 44a7bb32-9563-492a-b20e-1354193651d2 |
| image | overcloud-compute (6250ce83-56f6-4b5f-8bcd-d3f170b9b7ae) |
| key_name | default |
| metadata | {} |
| name | ci-overcloud-NovaCompute0-rwvmd5ld5p7k |
| os-extended-volumes:volumes_attached | [] |
| status | ERROR |
| tenant_id | 6c7831f11fc944ce89fdfe09205f1f7d |
| updated | 2014-12-11T10:37:51Z |
| user_id | 74c6f23f576544fcad95de5498dada0d |
+--------------------------------------+---------------------------------------------------------------------------------------------+