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[varada <1471959@xxxxxxxxxxxxxxxxxx>]

*** This bug is a duplicate of bug 1417379 ***
    https://bugs.launchpad.net/bugs/1417379

just now noticed, this is duplicate to bug
https://bugs.launchpad.net/neutron/+bug/1417379

** This bug has been marked a duplicate of bug 1417379
   KeyError returned when subnet-update enable_dhcp to False

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https://bugs.launchpad.net/bugs/1471959

Title:
  Dhcp error in network with two subnet when one is disabled

Status in neutron:
  New

Bug description:
  Trace:
  ERROR neutron.agent.dhcp_agent [-] Unable to enable dhcp for 125c7403-1ef1-489c-bc0c-cf6a0f83e742.
  Traceback (most recent call last):
    File "/opt/stack/neutron/neutron/agent/dhcp_agent.py", line 128, in call_driver
      getattr(driver, action)(**action_kwargs)
    File "/opt/stack/neutron/neutron/agent/linux/dhcp.py", line 207, in enable
      self.spawn_process()
    File "/opt/stack/neutron/neutron/agent/linux/dhcp.py", line 376, in spawn_process
      '--dhcp-optsfile=%s' % self._output_opts_file(),
    File "/opt/stack/neutron/neutron/agent/linux/dhcp.py", line 646, in _output_opts_file
      isolated_subnets = self.get_isolated_subnets(self.network)
    File "/opt/stack/neutron/neutron/agent/linux/dhcp.py", line 812, in get_isolated_subnets
      if subnets[alloc.subnet_id].gateway_ip == alloc.ip_address:
  KeyError: u'f1ff257b-ddb8-4069-bf9f-8a60bd704097'
  TRACE neutron.agent.dhcp_agent KeyError: u'f1ff257b-ddb8-4069-bf9f-8a60bd704097'
  TRACE neutron.agent.dhcp_agent 

  
  Steps to reproduce:
  NET_NAME=test-key
  I=11
  neutron net-create ${NET_NAME}
  neutron port-create ${NET_NAME}
  neutron subnet-create --name "${NET_NAME}-sub001" ${NET_NAME} 192.168.${I}.1/24
  neutron subnet-create --name "${NET_NAME}-sub002" ${NET_NAME} 192.168.${I}1.1/24
  while [ "$(neutron port-list | grep "192.168.${I}" | wc -l)" != 2 ]; do
      echo "waiting for dhcp port on both subnet"
  done
  neutron subnet-update --disable-dhcp "${NET_NAME}-sub002"
  sleep 10
  if [ "$(neutron port-list | grep "192.168.${I}" | wc -l)" != 2 ]; then
      echo "failed"
  fi

  Impact:
  cause logs to grow more than necessary

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