ERR: Exception dispatching event <nova.virt.event.LifecycleEvent object at 0x3e49cd0>

[Anastasia Palkina]

"build_id": "2014-08-11_12-45-06",
"mirantis": "yes",
"build_number": "169",
"ostf_sha": "09b6bccf7d476771ac859bb3c76c9ebec9da9e1f",
"nailgun_sha": "04ada3cd7ef14f6741a05fd5d6690260f9198095",
"production": "docker",
"api": "1.0",
"fuelmain_sha": "43374c706b4fdce28aeb4ef11e69a53f41646740",
"astute_sha": "6db5f5031b74e67b92fcac1f7998eaa296d68025",
"release": "5.0.1",
"fuellib_sha": "a31dbac8fff9cf6bc4cd0d23459670e34b27a9ab"

1. Create new environment (CentOS, HA mode)
2. Choose nova-network, flat
3. Add 3 controllers, 1 compute, 1 compute+cinder
4. Start deployment. It was seccessful
5. There are errors on compute nodes (node-4,5) in nova-compute.log:

2014-08-13 08:40:14 ERROR

nova.virt.driver [-] Exception dispatching event <nova.virt.event.LifecycleEvent object at 0x2c82110>: Info cache for instance cb0c2e45-8912-490e-9f2c-fa88cf94b633 could not be found.
2014-08-13T08:40:14.363250+00:00 debug: Traceback (most recent call last):
2014-08-13T08:40:14.363250+00:00 debug: File "/usr/lib/python2.6/site-packages/nova/conductor/manager.py", line 597, in _object_dispatch
2014-08-13T08:40:14.363250+00:00 debug: return getattr(target, method)(context, *args, **kwargs)
2014-08-13T08:40:14.363250+00:00 debug: File "/usr/lib/python2.6/site-packages/nova/objects/base.py", line 151, in wrapper
2014-08-13T08:40:14.363250+00:00 debug: return fn(self, ctxt, *args, **kwargs)
2014-08-13T08:40:14.363250+00:00 debug: File "/usr/lib/python2.6/site-packages/nova/objects/instance.py", line 500, in refresh
2014-08-13T08:40:14.363250+00:00 debug: self.info_cache.refresh()
2014-08-13T08:40:14.363250+00:00 debug: File "/usr/lib/python2.6/site-packages/nova/objects/base.py", line 151, in wrapper
2014-08-13T08:40:14.363250+00:00 debug: return fn(self, ctxt, *args, **kwargs)
2014-08-13T08:40:14.363250+00:00 debug: File "/usr/lib/python2.6/site-packages/nova/objects/instance_info_cache.py", line 103, in refresh
2014-08-13T08:40:14.363250+00:00 debug: self.instance_uuid)
2014-08-13T08:40:14.363250+00:00 debug: File "/usr/lib/python2.6/site-packages/nova/objects/base.py", line 112, in wrapper
2014-08-13T08:40:14.363250+00:00 debug: result = fn(cls, context, *args, **kwargs)
2014-08-13T08:40:14.363250+00:00 debug: File "/usr/lib/python2.6/site-packages/nova/objects/instance_info_cache.py", line 70, in get_by_instance_uuid
2014-08-13T08:40:14.365746+00:00 debug: instance_uuid=instance_uuid)
2014-08-13T08:40:14.365746+00:00 debug: InstanceInfoCacheNotFound: Info cache for instance cb0c2e45-8912-490e-9f2c-fa88cf94b633 could not be found.

Also I found similar bug with "Review in progress" status in gerrit:
https://bugs.launchpad.net/nova/+bug/1304968

Logs are here: https://drive.google.com/a/mirantis.com/file/d/0B6SjzarTGFxabEI1Wm11b0c0Y2M/edit?usp=sharing

[Roman Podoliaka (rpodolyaka)]

This happens once per instance deletion and does not affect any other instances (or the new ones). At the same time, log files are littered with misleading tracebacks.

[Dmitry Mescheryakov (dmitrymex)]

Moving to 6.0 since we've already reached soft code freeze and it is a minor issue

[Dmitry Borodaenko (angdraug)]

Why is this targeted for maintenance releases if it's a Low priority bug?

[Roman Podoliaka (rpodolyaka)]

Fixed by merging the upstream code in https://review.fuel-infra.org/#/c/184/ and https://review.fuel-infra.org/#/c/169/

[Roman Podoliaka (rpodolyaka)]

The fix is in the latest ISOs