Open Stack

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
>
> Hewlett-Packard Limited registered Office: Cain Road, Bracknell, Berks
> RG12 1HN Registered No: 690597 England. The contents of this message and
> any attachments to it are confidential and may be legally privileged. If
> you have received this message in error, you should delete it from your
> system immediately and advise the sender. To any recipient of this
> message within HP, unless otherwise stated you should consider this
> message and attachments as "HP CONFIDENTIAL".
>
>
>
> _______________________________________________
> OpenStack-dev mailing list
> OpenStack-dev at lists.openstack.org
> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
>