Thanks Andreas. Yes it was a configuration issue. After correcting with
double slashes VM got launched.

** Changed in: neutron
       Status: Incomplete => Invalid

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https://bugs.launchpad.net/bugs/1553057

Title:
  Unable to launch an instance due to "ERROR
  nova.api.openstack.extensions

Status in neutron:
  Invalid

Bug description:
  Creation of Instance fails

  ~# nova boot --flavor 1 --image cirros --nic 
net-id=8856e7be-bce7-42e4-84ff-58edd7b26b41 TestVM
  ERROR (ClientException): Unexpected API Error. Please report this at 
http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.
  <class 'requests.exceptions.MissingSchema'> (HTTP 500) (Request-ID: 
req-3d3303f9-b64a-4021-a674-4ba7f55fa030)

  Here are the nova.api logs from controller node

  2016-03-04 00:49:52.212 2848 INFO nova.osapi_compute.wsgi.server 
[req-1b295f62-f15b-45e1-99fe-a9e9af22795c 96376c21180244ca8266841b90b74275 
e195f8abb6bb4e778f6afb73aeb8bb74 - - -] 10.140.33.254 "GET 
/v2/e195f8abb6bb4e778f6afb73aeb8bb74/flavors/1 HTTP/1.1" status: 200 len: 615 
time: 0.2387350
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions 
[req-7763e88d-a861-4890-bd7e-7feccce4394e 96376c21180244ca8266841b90b74275 
e195f8abb6bb4e778f6afb73aeb8bb74 - - -] Unexpected exception in API method
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions Traceback 
(most recent call last):
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/nova/api/openstack/extensions.py", line 478, 
in wrapped
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     return 
f(*args, **kwargs)
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/nova/api/validation/__init__.py", line 73, in 
wrapper
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     return 
func(*args, **kwargs)
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/nova/api/validation/__init__.py", line 73, in 
wrapper
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     return 
func(*args, **kwargs)
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/nova/api/openstack/compute/servers.py", line 
611, in create
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     
**create_kwargs)
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/nova/hooks.py", line 149, in inner
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     rv = 
f(*args, **kwargs)
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 1581, in create
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     
check_server_group_quota=check_server_group_quota)
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 1181, in 
_create_instance
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     
auto_disk_config, reservation_id, max_count)
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 923, in 
_validate_and_build_base_options
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     
requested_networks, max_count)
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 533, in 
_check_requested_networks
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     
max_count)
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/nova/network/neutronv2/api.py", line 1171, in 
validate_networks
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     context, 
neutron, requested_networks)
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/nova/network/neutronv2/api.py", line 1143, in 
_ports_needed_per_instance
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     
neutron=neutron)
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/nova/network/neutronv2/api.py", line 282, in 
_get_available_networks
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     nets = 
neutron.list_networks(**search_opts).get('networks', [])
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 102, in 
with_params
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     ret = 
self.function(instance, *args, **kwargs)
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 574, in 
list_networks
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     
**_params)
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 307, in 
list
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     for r in 
self._pagination(collection, path, **params):
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 320, in 
_pagination
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     res = 
self.get(path, params=params)
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 293, in 
get
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     
headers=headers, params=params)
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 270, in 
retry_request
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     
headers=headers, params=params)
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 200, in 
do_request
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     
content_type=self.content_type())
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/neutronclient/client.py", line 306, in 
do_request
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     return 
self.request(url, method, **kwargs)
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/neutronclient/client.py", line 294, in request
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     resp = 
super(SessionClient, self).request(*args, **kwargs)
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/keystoneclient/adapter.py", line 95, in 
request
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     return 
self.session.request(url, method, **kwargs)
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/keystoneclient/utils.py", line 337, in inner
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     return 
func(*args, **kwargs)
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/keystoneclient/session.py", line 386, in 
request
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     resp = 
send(**kwargs)
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/keystoneclient/session.py", line 420, in 
_send_request
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     resp = 
self.session.request(method, url, **kwargs)
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/requests/sessions.py", line 451, in request
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     prep = 
self.prepare_request(req)
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/requests/sessions.py", line 382, in 
prepare_request
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     
hooks=merge_hooks(request.hooks, self.hooks),
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/requests/models.py", line 304, in prepare
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     
self.prepare_url(url, params)
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions   File 
"/usr/lib/python2.7/dist-packages/requests/models.py", line 362, in prepare_url
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions     
to_native_string(url, 'utf8')))
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions 
MissingSchema: Invalid URL 
'http:/quasarcn10:9696/v2.0/networks.json?id=8856e7be-bce7-42e4-84ff-58edd7b26b41':
 No schema supplied. Perhaps you meant 
http://http:/quasarcn10:9696/v2.0/networks.json?id=8856e7be-bce7-42e4-84ff-58edd7b26b41?
  2016-03-04 00:49:53.075 2848 ERROR nova.api.openstack.extensions
  2016-03-04 00:49:53.079 2848 INFO nova.api.openstack.wsgi 
[req-7763e88d-a861-4890-bd7e-7feccce4394e 96376c21180244ca8266841b90b74275 
e195f8abb6bb4e778f6afb73aeb8bb74 - - -] HTTP exception thrown: Unexpected API 
Error. Please report this at http://bugs.launchpad.net/nova/ and attach the 
Nova API log if possible.
  <class 'requests.exceptions.MissingSchema'>

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