yahoo-eng-team team mailing list archive

[LIU Yulong <yulong@xxxxxxxxxxxxx>]

This bug comes again:
http://paste.openstack.org/show/523757/

** Changed in: neutron
       Status: Fix Released => New

-- 
You received this bug notification because you are a member of Yahoo!
Engineering Team, which is subscribed to neutron.
https://bugs.launchpad.net/bugs/1533441

Title:
  HA router can not be deleted in L3 agent after race between HA router
  creating and deleting

Status in neutron:
  New
Status in neutron kilo series:
  New

Bug description:
  HA router can not be deleted in L3 agent after race between HA router
  creating and deleting

  Exception:
  1. Unable to process HA router %s without HA port (HA router initialize)

  2. AttributeError: 'NoneType' object has no attribute 'config' (HA
  router deleting procedure)

  
  With the newest neutron code, I find a infinite loop in _safe_router_removed.
  Consider a HA router without HA port was placed in the l3 agent,
  usually because of the race condition.

  Infinite loop steps:
  1. a HA router deleting RPC comes
  2. l3 agent remove it
  3. the RouterInfo will delete its the router namespace(self.router_namespace.delete())
  4. the HaRouter, ha_router.delete(), where the AttributeError: 'NoneType' or some error will be raised.
  5. _safe_router_removed return False
  6. self._resync_router(update)
  7. the router namespace is not existed, RuntimeError raised, go to 5, infinite loop 5 - 7

To manage notifications about this bug go to:
https://bugs.launchpad.net/neutron/+bug/1533441/+subscriptions