From description you provided it doesn't look like an error.
> Unable to create allocation for 'MEMORY_MB' on resource provider '610ee875-405e-4738-8099-5a218fa4986f'. The requested amount would violate inventory constraints.
means that on compute node you don't have enough memory resource.
You could look either at DB state (http://ix.io/oXq) or at placement API (http://ix.io/oXr)
From description you provided it doesn't look like an error.
> Unable to create allocation for 'MEMORY_MB' on resource provider '610ee875- 405e-4738- 8099-5a218fa498 6f'. The requested amount would violate inventory constraints.
means that on compute node you don't have enough memory resource. ix.io/oXq) or at placement API (http:// ix.io/oXr)
You could look either at DB state (http://