unable to start the instance

I have installed openstack on centos. The centos vm is installed on ESX. On two such centos VMs, I am trying to install openstack. I am unable to start the instance: The scheduler log is hown below 2013-12-26 04:41:49.236 1880 ERROR nova.scheduler.filter_scheduler [req-a5eb6f8a-6383-4ece-a813-fc0ab86c0056 75515c357bed4240b26ac7b3cfa364d7 01fc5697da1b4970ae785fdfe5300ae3] [instance: 9fab8885-e3d9-4e80-9ae0-63bd0239fe8a] Error from last host: controller (node controller): [u'Traceback (most recent call last):\n', u' File "/usr/lib/python2.6/site-packages/nova/compute/manager.py", line 1037, in _build_instance\n set_access_ip=set_access_ip)\n', u' File "/usr/lib/python2.6/site-packages/nova/compute/manager.py", line 1420, in _spawn\n LOG.exception(_(\'Instance failed to spawn\'), instance=instance)\n', u' File "/usr/lib/python2.6/site-packages/nova/compute/manager.py", line 1417, in _spawn\n block_device_info)\n', u' File "/usr/lib/python2.6/site-packages/nova/virt/libvirt/driver.py", line 2059, in spawn\n admin_pass=admin_password)\n', u' File "/usr/lib/python2.6/site-packages/nova/virt/libvirt/driver.py", line 2457, in _create_image\n net = netutils.get_injected_network_template(network_info)\n', u' File "/usr/lib/python2.6/site-packages/nova/virt/netutils.py", line 74, in get_injected_network_template\n if not (network_info and template):\n', u' File "/usr/lib/python2.6/site-packages/nova/network/model.py", line 379, in __len__\n return self._sync_wrapper(fn, *args, **kwargs)\n', u' File "/usr/lib/python2.6/site-packages/nova/network/model.py", line 366, in _sync_wrapper\n self.wait()\n', u' File "/usr/lib/python2.6/site-packages/nova/network/model.py", line 398, in wait\n self[:] = self._gt.wait()\n', u' File "/usr/lib/python2.6/site-packages/eventlet/greenthread.py", line 166, in wait\n return self._exit_event.wait()\n', u' File "/usr/lib/python2.6/site-packages/eventlet/event.py", line 116, in wait\n return hubs.get_hub().switch()\n', u' File "/usr/lib/python2.6/site-packages/eventlet/hubs/hub.py", line 177, in switch\n return self.greenlet.switch()\n', u' File "/usr/lib/python2.6/site-packages/eventlet/greenthread.py", line 192, in main\n result = function(*args, **kwargs)\n', u' File "/usr/lib/python2.6/site-packages/nova/compute/manager.py", line 1238, in _allocate_network_async\n dhcp_options=dhcp_options)\n', u' File "/usr/lib/python2.6/site-packages/nova/network/api.py", line 94, in wrapped\n return func(self, context, *args, **kwargs)\n', u' File "/usr/lib/python2.6/site-packages/nova/network/api.py", line 49, in wrapper\n res = f(self, context, *args, **kwargs)\n', u' File "/usr/lib/python2.6/site-packages/nova/network/api.py", line 301, in allocate_for_instance\n nw_info = self.network_rpcapi.allocate_for_instance(context, **args)\n', u' File "/usr/lib/python2.6/site-packages/nova/network/rpcapi.py", line 184, in allocate_for_instance\n macs=jsonutils.to_primitive(macs))\n', u' File "/usr/lib/python2.6/site-packages/nova/rpcclient.py", line 85, in call\n return self._invoke(self.proxy.call, ctxt, method, **kwargs)\n', u' File "/usr/lib/python2.6/site-packages/nova/rpcclient.py", line 63, in _invoke\n return cast_or_call(ctxt, msg, **self.kwargs)\n', u' File "/usr/lib/python2.6/site-packages/nova/openstack/common/rpc/proxy.py", line 126, in call\n result = rpc.call(context, real_topic, msg, timeout)\n', u' File "/usr/lib/python2.6/site-packages/nova/openstack/common/rpc/__init__.py", line 139, in call\n return _get_impl().call(CONF, context, topic, msg, timeout)\n', u' File "/usr/lib/python2.6/site-packages/nova/openstack/common/rpc/impl_qpid.py", line 783, in call\n rpc_amqp.get_connection_pool(conf, Connection))\n', u' File "/usr/lib/python2.6/site-packages/nova/openstack/common/rpc/amqp.py", line 574, in call\n rv = list(rv)\n', u' File "/usr/lib/python2.6/site-packages/nova/openstack/common/rpc/amqp.py", line 539, in __iter__\n raise result\n', u'RemoteError: Remote error: Timeout Timeout while waiting on RPC response - topic: "network.controller", RPC method: "_rpc_allocate_fixed_ip" info: ""\n[u\'Traceback (most recent call last):\\n\', u\' File "/usr/lib/python2.6/site-packages/nova/openstack/common/rpc/amqp.py", line 461, in _process_data\\n **args)\\n\', u\' File "/usr/lib/python2.6/site-packages/nova/openstack/common/rpc/dispatcher.py", line 172, in dispatch\\n result = getattr(proxyobj, method)(ctxt, **kwargs)\\n\', u\' File "/usr/lib/python2.6/site-packages/nova/network/floating_ips.py", line 118, in allocate_for_instance\\n **kwargs)\\n\', u\' File "/usr/lib/python2.6/site-packages/nova/network/manager.py", line 510, in allocate_for_instance\\n requested_networks=requested_networks)\\n\', u\' File "/usr/lib/python2.6/site-packages/nova/network/manager.py", line 217, in _allocate_fixed_ips\\n gt.wait()\\n\', u\' File "/usr/lib/python2.6/site-packages/eventlet/greenthread.py", line 166, in wait\\n return self._exit_event.wait()\\n\', u\' File "/usr/lib/python2.6/site-packages/eventlet/event.py", line 116, in wait\\n return hubs.get_hub().switch()\\n\', u\' File "/usr/lib/python2.6/site-packages/eventlet/hubs/hub.py", line 177, in switch\\n return self.greenlet.switch()\\n\', u\' File "/usr/lib/python2.6/site-packages/eventlet/greenthread.py", line 192, in main\\n result = function(*args, **kwargs)\\n\', u\' File "/usr/lib/python2.6/site-packages/nova/network/rpcapi.py", line 295, in _rpc_allocate_fixed_ip\\n address=address, vpn=vpn)\\n\', u\' File "/usr/lib/python2.6/site-packages/nova/rpcclient.py", line 85, in call\\n return self._invoke(self.proxy.call, ctxt, method, **kwargs)\\n\', u\' File "/usr/lib/python2.6/site-packages/nova/rpcclient.py", line 63, in _invoke\\n return cast_or_call(ctxt, msg, **self.kwargs)\\n\', u\' File "/usr/lib/python2.6/site-packages/nova/openstack/common/rpc/proxy.py", line 130, in call\\n exc.info, real_topic, msg.get(\\\'method\\\'))\\n\', u\'Timeout: Timeout while waiting on RPC response - topic: "network.controller", RPC method: "_rpc_allocate_fixed_ip" info: ""\\n\'].\n'] 2013-12-26 04:41:49.258 1880 WARNING nova.scheduler.driver [req-a5eb6f8a-6383-4ece-a813-fc0ab86c0056 75515c357bed4240b26ac7b3cfa364d7 01fc5697da1b4970ae785fdfe5300ae3] [instance: 9fab8885-e3d9-4e80-9ae0-63bd0239fe8a] Setting instance to ERROR state.