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[Belmiro Moreira <1307223@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Using cells and the target_cell filter.
With the scheduler hint "target_cell" if path is not valid
instance will stay in "scheduling" task state.

nova cells shows the following trace:

2014-04-13 20:25:40.237 ERROR nova.cells.messaging [req-8bc1d2a7-92aa-48b6-afda-42f255e43904 demo demo] Error locating next hop for message: Inconsistency in cell routing: Unknown child when routing to region!other
2014-04-13 20:25:40.237 TRACE nova.cells.messaging Traceback (most recent call last):
2014-04-13 20:25:40.237 TRACE nova.cells.messaging   File "/opt/stack/nova/nova/cells/messaging.py", line 406, in process
2014-04-13 20:25:40.237 TRACE nova.cells.messaging     next_hop = self._get_next_hop()
2014-04-13 20:25:40.237 TRACE nova.cells.messaging   File "/opt/stack/nova/nova/cells/messaging.py", line 387, in _get_next_hop
2014-04-13 20:25:40.237 TRACE nova.cells.messaging     raise exception.CellRoutingInconsistency(reason=reason)
2014-04-13 20:25:40.237 TRACE nova.cells.messaging CellRoutingInconsistency: Inconsistency in cell routing: Unknown child when routing to region!other
2014-04-13 20:25:40.237 TRACE nova.cells.messaging 

Expected:
instance state changes to ERROR status.

** Affects: nova
     Importance: Undecided
         Status: New


** Tags: cells

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https://bugs.launchpad.net/bugs/1307223

Title:
  If target_cell path not valid instance stays in BUILD status

Status in OpenStack Compute (Nova):
  New

Bug description:
  Using cells and the target_cell filter.
  With the scheduler hint "target_cell" if path is not valid
  instance will stay in "scheduling" task state.

  nova cells shows the following trace:

  2014-04-13 20:25:40.237 ERROR nova.cells.messaging [req-8bc1d2a7-92aa-48b6-afda-42f255e43904 demo demo] Error locating next hop for message: Inconsistency in cell routing: Unknown child when routing to region!other
  2014-04-13 20:25:40.237 TRACE nova.cells.messaging Traceback (most recent call last):
  2014-04-13 20:25:40.237 TRACE nova.cells.messaging   File "/opt/stack/nova/nova/cells/messaging.py", line 406, in process
  2014-04-13 20:25:40.237 TRACE nova.cells.messaging     next_hop = self._get_next_hop()
  2014-04-13 20:25:40.237 TRACE nova.cells.messaging   File "/opt/stack/nova/nova/cells/messaging.py", line 387, in _get_next_hop
  2014-04-13 20:25:40.237 TRACE nova.cells.messaging     raise exception.CellRoutingInconsistency(reason=reason)
  2014-04-13 20:25:40.237 TRACE nova.cells.messaging CellRoutingInconsistency: Inconsistency in cell routing: Unknown child when routing to region!other
  2014-04-13 20:25:40.237 TRACE nova.cells.messaging 

  Expected:
  instance state changes to ERROR status.

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