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[OpenStack Infra <1179713@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/160214
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=8f036fd34011bbf138815b21e2ef4c9760a5e0e6
Submitter: Jenkins
Branch:    master

commit 8f036fd34011bbf138815b21e2ef4c9760a5e0e6
Author: watanabe isao <watanabe_isao@xxxxxxxxxxxxxx>
Date:   Tue Jun 30 14:36:40 2015 +0900

    Mitigate restriction for fixed ips per dhcp port
    
    When number of fixed ips per dhcp port exceeds max_fixed_ips_per_port,
    a dhcp resync will be triggered.
    
    The bug report stated how simply this issue can be triggered.
    Moreover, "max_fixed_ips_per_port" value should be used for non-DHCP
    port only and DHCP port is not affected by this parameter.
    
    Change-Id: Iaa9ed6949383ba6a7ce0b3ffd9dcced663126317
    Co-authored-by: NGUYEN TUONG THANH <thanhnt@xxxxxxxxxxxxxx>
    Closes-Bug: #1179713


** Changed in: neutron
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1179713

Title:
  too many subnet-create cause q-dhcp failure

Status in neutron:
  Fix Released

Bug description:
  I create several subnets in my 'private' network:

  quantum subnet-create private  CIDR_{i} --verbose

  the client keeps returning success. However, after the fifth attempt,
  I see my dhcp agent spitting out nasty errors, like the one below:

  2013-05-13 15:29:46    ERROR [quantum.agent.dhcp_agent] Unable to restart dhcp.
  Traceback (most recent call last):
    File "/opt/stack/quantum/quantum/agent/dhcp_agent.py", line 130, in call_driver
      getattr(driver, action)()
    File "/opt/stack/quantum/quantum/agent/linux/dhcp.py", line 87, in restart
      self.enable()
    File "/opt/stack/quantum/quantum/agent/linux/dhcp.py", line 123, in enable
      reuse_existing=True)
    File "/opt/stack/quantum/quantum/agent/dhcp_agent.py", line 530, in setup
      port = self.plugin.get_dhcp_port(network.id, device_id)
    File "/opt/stack/quantum/quantum/agent/dhcp_agent.py", line 379, in get_dhcp_port
      topic=self.topic))
    File "/opt/stack/quantum/quantum/openstack/common/rpc/proxy.py", line 86, in call
      return rpc.call(context, real_topic, msg, timeout)
    File "/opt/stack/quantum/quantum/openstack/common/rpc/__init__.py", line 140, in call
      return _get_impl().call(CONF, context, topic, msg, timeout)
    File "/opt/stack/quantum/quantum/openstack/common/rpc/impl_kombu.py", line 798, in call
      rpc_amqp.get_connection_pool(conf, Connection))
    File "/opt/stack/quantum/quantum/openstack/common/rpc/amqp.py", line 615, in call
      rv = list(rv)
    File "/opt/stack/quantum/quantum/openstack/common/rpc/amqp.py", line 564, in __iter__
      raise result
  RemoteError: Remote error: InvalidInput Invalid input for operation: Exceeded maximim amount of fixed ips per port.

  This happens with the ovs plugin, on master.

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