Description of problem:

Suppose I create a port and all the IPs in the subnet are exhausted, neutron server returns error 409 with the message -

RESP: [409] Content-Type: application/json Content-Length: 164 X-Openstack-Request-Id: req-2023b247-2602-4835-9817-6be51d5452d0 Date: Mon, 20 Aug 2018 16:26:07 GMT 
RESP BODY: {"NeutronError": {"message": "No more IP addresses available on network 3658721d-ec0c-41a5-9fe0-5d726079e822.", "type": "IpAddressGenerationFailure", "detail": ""}}

But openstack client displays the final result as

(overcloud) [stack@undercloud-0 ~]$ openstack port create --network priv p3 
HttpException: Unknown error
(overcloud) [stack@undercloud-0 ~]$ 

The same command when used with upstream devstack, it displays as

[stack@numcentos ~]$ openstack port create --network priv t3
ConflictException: 409: Client Error for url: http://127.0.0.1:9696/v2.0/ports, {"NeutronError": {"message": "No more IP addresses available on network 18ac8052-aea1-47f5-a18f-d93b0b6ceb93.", "type": "IpAddressGenerationFailure", "detail": ""}}



Version-Release number of selected component (if applicable):
OSP13
(overcloud) [stack@undercloud-0 ~]$ rpm -qa | grep python2-openstackclient
python2-openstackclient-3.14.2-1.el7ost.noarch



How reproducible:
All the time

Steps to Reproduce:
1. openstack network create priv
2. openstack subnet create --network priv --subnet-range 30.0.0.0/24 --allocation-pool start=30.0.0.2,end=30.0.0.4 priv_subnet
3. openstack port create --network priv p1
4. openstack port create --network priv p2
..
5. openstack port create --network priv p3 -debug
...
...
RESP BODY: {"NeutronError": {"message": "No more IP addresses available on network 3658721d-ec0c-41a5-9fe0-5d726079e822.", "type": "IpAddressGenerationFailure", "detail": ""}}

POST call to network for http://10.0.0.108:9696/v2.0/ports used request id req-da65aba0-a248-4d2b-a444-62e290e657f2
Manager unknown ran task network.POST.ports in 0.8569419384s
HttpException: Unknown error
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/cliff/app.py", line 400, in run_subcommand
    result = cmd.run(parsed_args)
  File "/usr/lib/python2.7/site-packages/osc_lib/command/command.py", line 41, in run
    return super(Command, self).run(parsed_args)
  File "/usr/lib/python2.7/site-packages/cliff/display.py", line 116, in run
    column_names, data = self.take_action(parsed_args)
  File "/usr/lib/python2.7/site-packages/openstackclient/network/v2/port.py", line 429, in take_action
    obj = client.create_port(**attrs)
  File "/usr/lib/python2.7/site-packages/openstack/network/v2/_proxy.py", line 1456, in create_port
    return self._create(_port.Port, **attrs)
  File "/usr/lib/python2.7/site-packages/openstack/proxy.py", line 194, in _create
    return res.create(self)
  File "/usr/lib/python2.7/site-packages/openstack/resource.py", line 732, in create
    self._translate_response(response)
  File "/usr/lib/python2.7/site-packages/openstack/resource.py", line 664, in _translate_response
    exceptions.raise_from_response(response, error_message=error_message)
  File "/usr/lib/python2.7/site-packages/openstack/exceptions.py", line 205, in raise_from_response
    http_status=http_status, request_id=request_id
HttpException: HttpException: Unknown error
clean_up CreatePort: HttpException: Unknown error
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/osc_lib/shell.py", line 134, in run
    ret_val = super(OpenStackShell, self).run(argv)
  File "/usr/lib/python2.7/site-packages/cliff/app.py", line 279, in run
    result = self.run_subcommand(remainder)
  File "/usr/lib/python2.7/site-packages/osc_lib/shell.py", line 169, in run_subcommand
    ret_value = super(OpenStackShell, self).run_subcommand(argv)
  File "/usr/lib/python2.7/site-packages/cliff/app.py", line 400, in run_subcommand
    result = cmd.run(parsed_args)
  File "/usr/lib/python2.7/site-packages/osc_lib/command/command.py", line 41, in run
    return super(Command, self).run(parsed_args)
  File "/usr/lib/python2.7/site-packages/cliff/display.py", line 116, in run
    column_names, data = self.take_action(parsed_args)
  File "/usr/lib/python2.7/site-packages/openstackclient/network/v2/port.py", line 429, in take_action
    obj = client.create_port(**attrs)
  File "/usr/lib/python2.7/site-packages/openstack/network/v2/_proxy.py", line 1456, in create_port
    return self._create(_port.Port, **attrs)
  File "/usr/lib/python2.7/site-packages/openstack/proxy.py", line 194, in _create
    return res.create(self)
  File "/usr/lib/python2.7/site-packages/openstack/resource.py", line 732, in create
    self._translate_response(response)
  File "/usr/lib/python2.7/site-packages/openstack/resource.py", line 664, in _translate_response
    exceptions.raise_from_response(response, error_message=error_message)
  File "/usr/lib/python2.7/site-packages/openstack/exceptions.py", line 205, in raise_from_response
    http_status=http_status, request_id=request_id
HttpException: HttpException: Unknown error

END return value: 1


Actual results:


Expected results:


Additional info: