Hi!
On 11/28/2014 11:41 AM, Murray, Paul (HP Cloud) wrote:
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.
It's possible that a periodic background process is going on, retrying
makes perfect sense for this case. We're trying to get away from
background processes causing Conflict btw.
Have I understood this or is there something about this I am not getting
right?
Paul
Paul Murray
Nova Technical Lead, HP Cloud
+44 117 316 2527
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