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[Mamatisa Nurmatov <1930838@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

In cleanup_deleted_ports https://github.com/openstack/neutron/blob/master/neutron/agent/dhcp/agent.py#L1044
the port is deleted from _deleted_ports, but not from _deleted_ports_ts. In the next loop, the port will be deleted again. However, the port has been deleted from _deleted_ports, and a keyerror error is reported.

ERROR [oslo.service.loopingcall] Fixed interval looping call 'neutron.agent.dhcp.agent.NetworkCache.cleanup_deleted_ports' failed
Traceback (most recent call last):
File "/home/isabek/projects/GIT/neutron/.tox/py38/lib/python3.8/site-packages/oslo_service/loopingcall.py", line 150, in _run_loop
result = func(*self.args, **self.kw)
File "/home/isabek/projects/GIT/neutron/neutron/agent/dhcp/agent.py", line 1057, in cleanup_deleted_ports
self._deleted_ports.remove(port_id)
KeyError: '12345678-1234-aaaa-1234567890ab'

** Affects: neutron
     Importance: Undecided
     Assignee: Mamatisa Nurmatov (isabek)
         Status: New

** Changed in: neutron
     Assignee: (unassigned) => Mamatisa Nurmatov (isabek)

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https://bugs.launchpad.net/bugs/1930838

Title:
  key error in deleted_ports

Status in neutron:
  New

Bug description:
  In cleanup_deleted_ports https://github.com/openstack/neutron/blob/master/neutron/agent/dhcp/agent.py#L1044
  the port is deleted from _deleted_ports, but not from _deleted_ports_ts. In the next loop, the port will be deleted again. However, the port has been deleted from _deleted_ports, and a keyerror error is reported.

  ERROR [oslo.service.loopingcall] Fixed interval looping call 'neutron.agent.dhcp.agent.NetworkCache.cleanup_deleted_ports' failed
  Traceback (most recent call last):
  File "/home/isabek/projects/GIT/neutron/.tox/py38/lib/python3.8/site-packages/oslo_service/loopingcall.py", line 150, in _run_loop
  result = func(*self.args, **self.kw)
  File "/home/isabek/projects/GIT/neutron/neutron/agent/dhcp/agent.py", line 1057, in cleanup_deleted_ports
  self._deleted_ports.remove(port_id)
  KeyError: '12345678-1234-aaaa-1234567890ab'

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