Github user rafaelweingartner commented on the pull request: https://github.com/apache/cloudstack/pull/1056#issuecomment-155415964 @DaanHoogland I agree with @miguelaferreira. I have looked that code. The select it runs is the following: select h.id from host h where h.status = 'Up' and h.hypervisor_type is not null and h.data_center_id = ? ORDER by rand() limit 1 That makes me wondering, why ordering by random the projection?! That can make problems harder to debug. Whatever, that is not the focus here. The only ways I see that select returning nothing are the following: ⢠If we have no hosts in the zone; ⢠If all of the hosts have hypervisor_type equal to null, is it even possible to have a host with hypervisor_type = null? I would be concerned about the first case, a zone with no hosts. Thus, we should have to check when the method âcom.cloud.hypervisor.ovm3.resources.Ovm3HypervisorGuru.performSideEffectsForDelegationOnCommand(long, Command)â is called. What API method ends up in that code, or what action of ACS is going execute it?
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