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[Armando Migliaccio <1432522@xxxxxxxxxxxxxxxxxx>]

** Changed in: neutron
       Status: In Progress => Won't Fix

** Changed in: neutron
       Status: Won't Fix => Invalid

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

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https://bugs.launchpad.net/bugs/1432522

Title:
  weakref ReferenceError not handled in callback manager

Status in OpenStack Neutron (virtual network service):
  Incomplete

Bug description:
  How to reproduce:
  1. register a callable 
  2. delete it
  3. notify

  Example output:

  2015-03-16 10:39:07.600 ERROR neutron.callbacks.manager [req-0e06ab7e-12f4-4807-bbbe-a05d183a54f5 None None] Error during notification for dragonflow.neutron.services.l3.l3_controller_plugin.ControllerL3ServicePlugin.dvr_vmarp_table_update port, after_update
  2015-03-16 10:39:07.600 TRACE neutron.callbacks.manager Traceback (most recent call last):
  2015-03-16 10:39:07.600 TRACE neutron.callbacks.manager   File "/opt/stack/neutron/neutron/callbacks/manager.py", line 143, in _notify_loop
  2015-03-16 10:39:07.600 TRACE neutron.callbacks.manager     callback(resource, event, trigger, **kwargs)
  2015-03-16 10:39:07.600 TRACE neutron.callbacks.manager ReferenceError: weakly-referenced object no longer exists
  2015-03-16 10:39:07.600 TRACE neutron.callbacks.manager

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