Comment 6 for bug 1259389

I did more debug:
1) the nova schduler did choose another compute host as destination , and instance's host was changed into the destination when the instance is in VERIFY_RESIZE state. But from vCenter the instance was still in original EXSi host (actuall there are two instances ,one with old name , one with suffix _orig). This is not right.

2) after resize , instance's host name was changed, the changed host name is not mananged by nova-compute , then resize confrim, nova-compute can't find the changed host name , then the error was raised.

Before resize
[root@10-1-0-71 nova]# nova show gcb_resize1
+--------------------------------------+----------------------------------------------------------+
| Property | Value |
+--------------------------------------+----------------------------------------------------------+
| status | ACTIVE |
| updated | 2013-12-18T07:42:27Z |
| OS-EXT-STS:task_state | None |
| OS-EXT-SRV-ATTR:host | vmware_nova_cluster01 |
| key_name | None |
| image | trend-thin (4432ca56-8be0-4794-9c22-52a8c7a2bf55) |
| network1 network | 10.0.1.2 |
| hostId | 964f8e94c6b9084b0059044896687b96e12dd97a33d61deb564244ee |
| OS-EXT-STS:vm_state | active |
| OS-EXT-SRV-ATTR:instance_name | instance-000000ca |
| OS-SRV-USG:launched_at | 2013-12-18T07:42:27.000000 |
| OS-EXT-SRV-ATTR:hypervisor_hostname | domain-c17(cluster01) |
| flavor | m1.tiny (1) |
| id | 2f93a76e-fcd7-4fe2-96c6-1a750b430f3c |
| security_groups | [{u'name': u'default'}] |
| OS-SRV-USG:terminated_at | None |
| user_id | 01dd320eb49d4bdfaa08a9ec021a48d4 |
| name | gcb_resize1 |
| created | 2013-12-18T07:41:38Z |
| tenant_id | 045dd87f67eb40d1b18f6c9498be3bd9 |
| OS-DCF:diskConfig | MANUAL |
| metadata | {} |
| os-extended-volumes:volumes_attached | [] |
| accessIPv4 | |
| accessIPv6 | |
| progress | 0 |
| OS-EXT-STS:power_state | 1 |
| OS-EXT-AZ:availability_zone | nova |
| config_drive | |
+--------------------------------------+----------------------------------------------------------+

After resize:
[root@10-1-0-71 nova]# nova show gcb_resize1
+--------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------+
| Property | Value |
+--------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------+
| status | ERROR |
| updated | 2013-12-18T08:05:52Z |
| OS-EXT-STS:task_state | None |
| OS-EXT-SRV-ATTR:host | vmware_nova_cluster02 |
| key_name | None |
| image | trend-thin (4432ca56-8be0-4794-9c22-52a8c7a2bf55) |
| network1 network | 10.0.1.2 |
| hostId | 5f93f60c197ee7af029b96f22fb39dea07a9caae6cbaee77481a6919 |
| OS-EXT-STS:vm_state | error |
| OS-EXT-SRV-ATTR:instance_name | instance-000000ca |
| OS-SRV-USG:launched_at | 2013-12-18T07:59:12.000000 |
| OS-EXT-SRV-ATTR:hypervisor_hostname | domain-c382(cluster02) |
| flavor | m1.small (2) |
| id | 2f93a76e-fcd7-4fe2-96c6-1a750b430f3c |
| security_groups | [{u'name': u'default'}] |
| OS-SRV-USG:terminated_at | None |
| user_id | 01dd320eb49d4bdfaa08a9ec021a48d4 |
| name | gcb_resize1 |
| created | 2013-12-18T07:41:38Z |
| tenant_id | 045dd87f67eb40d1b18f6c9498be3bd9 |
| OS-DCF:diskConfig | MANUAL |
| metadata | {} |
| os-extended-volumes:volumes_attached | [] |
| accessIPv4 | |
| accessIPv6 | |
| fault | {u'message': u'NV-3AB798A The resource domain-c382(cluster02) does not exist', u'code': 404, u'created': u'2013-12-18T08:05:52Z'} |
| OS-EXT-STS:power_state | 1 |
| OS-EXT-AZ:availability_zone | nova |
| config_drive | |
+--------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------+