I configured a OVS_multinode on ubuntu 12.04 with grizzly release and its working fine. Now i removed controller node from setup and added new i3 machine for configuring controller node. I did the configuration on new controller node and each and every process running fine, but when i try to launch VM in nova list showing ststus error.

root@controller:~# nova list
+--------------------------------------+-------------+--------+--------------------------+
| ID                                   | Name        | Status | Networks                 |
+--------------------------------------+-------------+--------+--------------------------+
| 1a854d52-a13b-453f-85b0-41543abcb458 | my_first_vm | ERROR  | kaveri_network=50.50.1.3 |
+--------------------------------------+-------------+--------+--------------------------+

here is the nova-scheduler.log

2013-12-26 19:00:01.331 ERROR nova.scheduler.filter_scheduler [req-8f9944c9-7c86-4915-adb4-50c5d6b5b661 be472c76a01b419eb4df7419d30a0029 9c8a0abd70924ebfaaddc95346455953] [instance: 1a854d52-a13b-453f-85b0-41543abcb458] Error from last host: compute (node compute.local.lan): [u'Traceback (most recent call last):\n', u'  File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 864, in _run_instance\n    set_access_ip=set_access_ip)\n', u'  File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 1123, in _spawn\n    LOG.exception(_(\'Instance failed to spawn\'), instance=instance)\n', u'  File "/usr/lib/python2.7/contextlib.py", line 24, in __exit__\n    self.gen.next()\n', u'  File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 1119, in _spawn\n    block_device_info)\n', u'  File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 1531, in spawn\n    block_device_info)\n', u'  File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 2444, in _create_domain_and_network\n    self.plug_vifs(instance, network_info)\n', u'  File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 686, in plug_vifs\n    self.vif_driver.plug(instance, (network, mapping))\n', u'  File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/vif.py", line 565, in plug\n    return self.plug_ovs_hybrid(instance, vif)\n', u'  File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/vif.py", line 377, in plug_ovs_hybrid\n    instance[\'uuid\'])\n', u'  File "/usr/lib/python2.7/dist-packages/nova/network/linux_net.py", line 1245, in create_ovs_vif_port\n    run_as_root=True)\n', u'  File "/usr/lib/python2.7/dist-packages/nova/utils.py", line 239, in execute\n    cmd=\' \'.join(cmd))\n', u"ProcessExecutionError: Unexpected error while running command.\nCommand: sudo nova-rootwrap /etc/nova/rootwrap.conf ovs-vsctl -- --may-exist add-port br-int qvode8c61a8-b2 -- set Interface qvode8c61a8-b2 external-ids:iface-id=de8c61a8-b21d-465f-b9ca-8e6e28defd18 external-ids:iface-status=active external-ids:attached-mac=fa:16:3e:e1:c3:f5 external-ids:vm-uuid=1a854d52-a13b-453f-85b0-41543abcb458\nExit code: 1\nStdout: ''\nStderr: 'ovs-vsctl: no bridge named br-int\\n'\n"]
2013-12-26 19:00:01.347 WARNING nova.scheduler.driver [req-8f9944c9-7c86-4915-adb4-50c5d6b5b661 be472c76a01b419eb4df7419d30a0029 9c8a0abd70924ebfaaddc95346455953] [instance: 1a854d52-a13b-453f-85b0-41543abcb458] Setting instance to ERROR state.

If i remove the existing controller node and add a new controller node with same configuration was it create any problem?