Comment 2 for bug 1811235

Dear Brin, I feel so sorry for replying too late.
I found this issue in private cloud, and also I found Ocata version of nova (15.1.5 release) may have this issue after reading its code. The key codes in nova/compute/manager.py --> class ComputeManager --> prep_resize --> _error_out_instance_on_exception.

Besides, I have some questions. First, why the latest version of nova not supports migrating instance to same host event through some drivers support that function..Second, if there is any problem when user migrates instance without migration destination host but there is just one compute node.