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[Bug 1233837] Re: target_iqn is referenced before assignment after exceptions in hyperv/volumeop.py attch_volume()

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** Changed in: nova/havana
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1233837

Title:
  target_iqn is referenced before assignment after exceptions in
  hyperv/volumeop.py attch_volume()

Status in OpenStack Compute (Nova):
  Fix Released
Status in OpenStack Compute (nova) havana series:
  Fix Released

Bug description:
  If a exception is encountered in _login_storage_target or
  _get_mounted_disk_from_lun target_iqn will be referenced in the
  exception handler before it is defined resulting in the following
  traceback:

  c39117134492490cba81828d080895b5 1a26ee4f153e438c806203607a0d728e] Exception during message handling
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp Traceback (most recent call last):
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp   File "C:\Program Files (x86)\IBM\SmartCloud Entry\Hyper-V Agent\Python27\lib\site-packages\nova\openstack\common\rpc\amqp.py", line 461, in _process_data
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp     **args)
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp   File "C:\Program Files (x86)\IBM\SmartCloud Entry\Hyper-V Agent\Python27\lib\site-packages\nova\openstack\common\rpc\dispatcher.py", line 172, in dispatch
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp     result = getattr(proxyobj, method)(ctxt, **kwargs)
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp   File "C:\Program Files (x86)\IBM\SmartCloud Entry\Hyper-V Agent\Python27\lib\site-packages\nova\exception.py", line 90, in wrapped
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp     payload)
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp   File "C:\Program Files (x86)\IBM\SmartCloud Entry\Hyper-V Agent\Python27\lib\site-packages\nova\exception.py", line 73, in wrapped
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp     return f(self, context, *args, **kw)
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp   File "C:\Program Files (x86)\IBM\SmartCloud Entry\Hyper-V Agent\Python27\lib\site-packages\nova\compute\manager.py", line 249, in decorated_function
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp     pass
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp   File "C:\Program Files (x86)\IBM\SmartCloud Entry\Hyper-V Agent\Python27\lib\site-packages\nova\compute\manager.py", line 235, in decorated_function
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp     return function(self, context, *args, **kwargs)
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp   File "C:\Program Files (x86)\IBM\SmartCloud Entry\Hyper-V Agent\Python27\lib\site-packages\nova\compute\manager.py", line 277, in decorated_function
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp     e, sys.exc_info())
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp   File "C:\Program Files (x86)\IBM\SmartCloud Entry\Hyper-V Agent\Python27\lib\site-packages\nova\compute\manager.py", line 264, in decorated_function
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp     return function(self, context, *args, **kwargs)
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp   File "C:\Program Files (x86)\IBM\SmartCloud Entry\Hyper-V Agent\Python27\lib\site-packages\nova\compute\manager.py", line 3676, in attach_volume
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp     context, instance, mountpoint)
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp   File "C:\Program Files (x86)\IBM\SmartCloud Entry\Hyper-V Agent\Python27\lib\site-packages\nova\compute\manager.py", line 3671, in attach_volume
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp     mountpoint, instance)
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp   File "C:\Program Files (x86)\IBM\SmartCloud Entry\Hyper-V Agent\Python27\lib\site-packages\nova\compute\manager.py", line 3717, in _attach_volume
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp     connector)
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp   File "C:\Program Files (x86)\IBM\SmartCloud Entry\Hyper-V Agent\Python27\lib\site-packages\nova\compute\manager.py", line 3707, in _attach_volume
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp     encryption=encryption)
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp   File "C:\Program Files (x86)\IBM\SmartCloud Entry\Hyper-V Agent\Python27\lib\site-packages\nova\virt\hyperv\driver.py", line 72, in attach_volume
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp     instance['name'])
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp   File "C:\Program Files (x86)\IBM\SmartCloud Entry\Hyper-V Agent\Python27\lib\site-packages\nova\virt\hyperv\volumeops.py", line 143, in attach_volume
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp     self._volutils.logout_storage_target(target_iqn)
  2013-10-01 16:06:19.993 5588 TRACE nova.openstack.common.rpc.amqp UnboundLocalError: local variable 'target_iqn' referenced before assignment

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