Comment 2 for bug 842856

Picked this out of a clean install:

2011-09-06 17:29:26,520 DEBUG nova.virt.libvirt.firewall [-] The nwfilter(nova-instance-instance-00000001-secgroup) for instance-00000001 is not found. from (pid=1164) unfilter_instance /usr/lib/pymodules/python2.7/nova/virt/libvirt/firewall.py:320
2011-09-06 17:29:26,521 INFO nova.virt.libvirt_conn [-] instance instance-00000001: deleting instance files /var/lib/nova/instances/instance-00000001
2011-09-06 17:29:26,521 DEBUG nova.utils [-] Running cmd (subprocess): sudo umount /var/lib/nova/instances/instance-00000001/rootfs from (pid=1164) execute /usr/lib/pymodules/python2.7/nova/utils.py:165
2011-09-06 17:29:26,544 DEBUG nova.utils [-] Running cmd (subprocess): sudo losetup -a from (pid=1164) execute /usr/lib/pymodules/python2.7/nova/utils.py:165
2011-09-06 17:29:26,622 ERROR nova.exception [-] Uncaught exception
(nova.exception): TRACE: Traceback (most recent call last):
(nova.exception): TRACE: File "/usr/lib/pymodules/python2.7/nova/exception.py", line 98, in wrapped
(nova.exception): TRACE: return f(*args, **kw)
(nova.exception): TRACE: File "/usr/lib/pymodules/python2.7/nova/compute/manager.py", line 117, in decorated_function
(nova.exception): TRACE: function(self, context, instance_id, *args, **kwargs)
(nova.exception): TRACE: File "/usr/lib/pymodules/python2.7/nova/compute/manager.py", line 492, in terminate_instance
(nova.exception): TRACE: self._shutdown_instance(context, instance_id, 'Terminating')
(nova.exception): TRACE: File "/usr/lib/pymodules/python2.7/nova/compute/manager.py", line 483, in _shutdown_instance
(nova.exception): TRACE: self.driver.destroy(instance, network_info)
(nova.exception): TRACE: File "/usr/lib/pymodules/python2.7/nova/virt/libvirt/connection.py", line 326, in destroy
(nova.exception): TRACE: self._cleanup(instance)
(nova.exception): TRACE: File "/usr/lib/pymodules/python2.7/nova/virt/libvirt/connection.py", line 338, in _cleanup
(nova.exception): TRACE: shutil.rmtree(target)
(nova.exception): TRACE: File "/usr/lib/python2.7/shutil.py", line 244, in rmtree
(nova.exception): TRACE: rmtree(fullname, ignore_errors, onerror)
(nova.exception): TRACE: File "/usr/lib/python2.7/shutil.py", line 253, in rmtree
(nova.exception): TRACE: onerror(os.rmdir, path, sys.exc_info())
(nova.exception): TRACE: File "/usr/lib/python2.7/shutil.py", line 251, in rmtree
(nova.exception): TRACE: os.rmdir(path)
(nova.exception): TRACE: OSError: [Errno 16] Device or resource busy: '/var/lib/nova/instances/instance-00000001/rootfs'
(nova.exception): TRACE:
2011-09-06 17:29:26,661 ERROR nova.rpc [-] Exception during message handling
(nova.rpc): TRACE: Traceback (most recent call last):
(nova.rpc): TRACE: File "/usr/lib/pymodules/python2.7/nova/rpc/impl_kombu.py", line 620, in _process_data
(nova.rpc): TRACE: rval = node_func(context=ctxt, **node_args)
(nova.rpc): TRACE: File "/usr/lib/pymodules/python2.7/nova/exception.py", line 129, in wrapped
(nova.rpc): TRACE: raise Error(str(e))
(nova.rpc): TRACE: Error: [Errno 16] Device or resource busy: '/var/lib/nova/instances/instance-00000001/rootfs'
(nova.rpc): TRACE: