On 11/28/2018 02:50 AM, Zufar Dhiyaulhaq wrote: > Hi, > > Thank you. I am able to fix this issue by adding this configuration into > nova configuration file in controller node. > > driver=filter_scheduler That's the default: https://docs.openstack.org/ocata/config-reference/compute/config-options.html So that was definitely not the solution to your problem. My guess is that Sean's suggestion to randomize the allocation candidates fixed your issue. Best, -jay