Hi All,

Looking at the ironic virt driver code in nova it seems that a Conflict (409) 
response from the ironic client results in the driver re-trying the request. 
Given the comment below in the ironic code I would imagine that is not the 
right behavior - it reads as though this is something that would fail on the 
retry as well.

class Conflict(HTTPClientError):
    """HTTP 409 - Conflict.

    Indicates that the request could not be processed because of conflict
    in the request, such as an edit conflict.
    http_status = 409
    message = _("Conflict")

An example of this is if the virt driver attempts to assign an instance to a 
node that is in the power on state it will issue this Conflict response.

Have I understood this or is there something about this I am not getting right?


Paul Murray
Nova Technical Lead, HP Cloud
+44 117 316 2527

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