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[Xiang Hui <xianghuir@xxxxxxxxx>]

Public bug reported:

Hi team,

  I encounter this error in a lightly complicated situation:

  OS : ubuntu
  Branch : Icehouse

  When booting a vm with admin role and assigning it with another tenant's private network, it's fine to work.
  But the update info cache action will started periodically, at this time, the privous mentioned  other tenant's
  private network is filtered out from the function "get_available_network()" if do not transfer the provisioned Non-None value net_ids parameter.  
Then bad things happened as below:

  The worst affect is the vm can not be deleted normally.

  2014-01-20 11:03:19.632 DEBUG nova.compute.manager [-] An error occurred from (pid=5521) _heal_instance_info_cache /opt/stack/nova/nova/compute/manager.py:4488
2014-01-20 11:03:19.632 TRACE nova.compute.manager Traceback (most recent call last):
2014-01-20 11:03:19.632 TRACE nova.compute.manager   File "/opt/stack/nova/nova/compute/manager.py", line 4484, in _heal_instance_info_cache
2014-01-20 11:03:19.632 TRACE nova.compute.manager     self._get_instance_nw_info(context, instance, use_slave=True)
2014-01-20 11:03:19.632 TRACE nova.compute.manager   File "/opt/stack/nova/nova/compute/manager.py", line 891, in _get_instance_nw_info
2014-01-20 11:03:19.632 TRACE nova.compute.manager     instance)
2014-01-20 11:03:19.632 TRACE nova.compute.manager   File "/opt/stack/nova/nova/network/api.py", line 50, in wrapper
2014-01-20 11:03:19.632 TRACE nova.compute.manager     res = f(self, context, *args, **kwargs)
2014-01-20 11:03:19.632 TRACE nova.compute.manager   File "/opt/stack/nova/nova/network/neutronv2/api.py", line 439, in get_instance_nw_info
2014-01-20 11:03:19.632 TRACE nova.compute.manager     result = self._get_instance_nw_info(context, instance, networks)
2014-01-20 11:03:19.632 TRACE nova.compute.manager   File "/opt/stack/nova/nova/network/neutronv2/api.py", line 446, in _get_instance_nw_info
2014-01-20 11:03:19.632 TRACE nova.compute.manager     nw_info = self._build_network_info_model(context, instance, networks)
2014-01-20 11:03:19.632 TRACE nova.compute.manager   File "/opt/stack/nova/nova/network/neutronv2/api.py", line 1043, in _build_network_info_model
2014-01-20 11:03:19.632 TRACE nova.compute.manager     subnets)
2014-01-20 11:03:19.632 TRACE nova.compute.manager   File "/opt/stack/nova/nova/network/neutronv2/api.py", line 952, in _nw_info_build_network
2014-01-20 11:03:19.632 TRACE nova.compute.manager     for net in networks:
2014-01-20 11:03:19.632 TRACE nova.compute.manager UnboundLocalError: local variable 'network_name' referenced before assignment

** Affects: nova
     Importance: Undecided
     Assignee: Xiang Hui (xianghui)
         Status: New

** Changed in: nova
     Assignee: (unassigned) => Xiang Hui (xianghui)

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https://bugs.launchpad.net/bugs/1271405

Title:
  local variable 'network_name' referenced before assignment

Status in OpenStack Compute (Nova):
  New

Bug description:
  Hi team,

    I encounter this error in a lightly complicated situation:

    OS : ubuntu
    Branch : Icehouse

    When booting a vm with admin role and assigning it with another tenant's private network, it's fine to work.
    But the update info cache action will started periodically, at this time, the privous mentioned  other tenant's
    private network is filtered out from the function "get_available_network()" if do not transfer the provisioned Non-None value net_ids parameter.  
  Then bad things happened as below:

    The worst affect is the vm can not be deleted normally.

    2014-01-20 11:03:19.632 DEBUG nova.compute.manager [-] An error occurred from (pid=5521) _heal_instance_info_cache /opt/stack/nova/nova/compute/manager.py:4488
  2014-01-20 11:03:19.632 TRACE nova.compute.manager Traceback (most recent call last):
  2014-01-20 11:03:19.632 TRACE nova.compute.manager   File "/opt/stack/nova/nova/compute/manager.py", line 4484, in _heal_instance_info_cache
  2014-01-20 11:03:19.632 TRACE nova.compute.manager     self._get_instance_nw_info(context, instance, use_slave=True)
  2014-01-20 11:03:19.632 TRACE nova.compute.manager   File "/opt/stack/nova/nova/compute/manager.py", line 891, in _get_instance_nw_info
  2014-01-20 11:03:19.632 TRACE nova.compute.manager     instance)
  2014-01-20 11:03:19.632 TRACE nova.compute.manager   File "/opt/stack/nova/nova/network/api.py", line 50, in wrapper
  2014-01-20 11:03:19.632 TRACE nova.compute.manager     res = f(self, context, *args, **kwargs)
  2014-01-20 11:03:19.632 TRACE nova.compute.manager   File "/opt/stack/nova/nova/network/neutronv2/api.py", line 439, in get_instance_nw_info
  2014-01-20 11:03:19.632 TRACE nova.compute.manager     result = self._get_instance_nw_info(context, instance, networks)
  2014-01-20 11:03:19.632 TRACE nova.compute.manager   File "/opt/stack/nova/nova/network/neutronv2/api.py", line 446, in _get_instance_nw_info
  2014-01-20 11:03:19.632 TRACE nova.compute.manager     nw_info = self._build_network_info_model(context, instance, networks)
  2014-01-20 11:03:19.632 TRACE nova.compute.manager   File "/opt/stack/nova/nova/network/neutronv2/api.py", line 1043, in _build_network_info_model
  2014-01-20 11:03:19.632 TRACE nova.compute.manager     subnets)
  2014-01-20 11:03:19.632 TRACE nova.compute.manager   File "/opt/stack/nova/nova/network/neutronv2/api.py", line 952, in _nw_info_build_network
  2014-01-20 11:03:19.632 TRACE nova.compute.manager     for net in networks:
  2014-01-20 11:03:19.632 TRACE nova.compute.manager UnboundLocalError: local variable 'network_name' referenced before assignment

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