Looking at the logs, ir-api started at 2015-04-06 16:48:10.051, while last attempt to do node.list from n-cpu happened on 2015-04-06 16:47:53.497. Also just happened to me on fresh devstack locally.
Looking at the logs, ir-api started at 2015-04-06 16:48:10.051, while last attempt to do node.list from n-cpu happened on 2015-04-06 16:47:53.497. Also just happened to me on fresh devstack locally.