Juju MAAS problem

environment: maas
machines:
  "0":
    agent-state: started
    agent-version: 1.18.4
    dns-name: juju-agent.maas.domain
    instance-id: /MAAS/api/1.0/nodes/node-03de2b18-f271-11e3-b556-525400ac7052/
    series: trusty
  "1":
    agent-state: started
    agent-version: 1.18.4
    dns-name: controller-cam1.maas.domain
    instance-id: /MAAS/api/1.0/nodes/node-97a849bc-f309-11e3-849f-525400ac7052/
    series: trusty
    containers:
      1/lxc/15:
        agent-state: started
        agent-version: 1.18.4
        dns-name: 172.30.114.50
        instance-id: juju-machine-1-lxc-15
        series: trusty
        hardware: arch=amd64
..... etc ....
      1/lxc/21:
        agent-state: started
        agent-version: 1.18.4
        dns-name: 172.30.114.56
        instance-id: juju-machine-1-lxc-21
        series: trusty
        hardware: arch=amd64
      1/lxc/22:
        instance-id: pending
        life: dead
        series: trusty
      1/lxc/23:
        instance-id: pending
        life: dead
        series: trusty
      1/lxc/24:
        instance-id: pending
        life: dead
        series: trusty
      1/lxc/25:
        instance-id: pending
        life: dead
        series: trusty
      1/lxc/26:
        instance-id: pending
        life: dead
        series: trusty
      1/lxc/27:
        instance-id: pending
        series: trusty