Hello,
  I am using Havana and every once in a while a VM fails to start and goes
into ERROR state. When I check the Nova compute logs, I find this error.
Note that this does not happen always. Can anybody shed light on why this
is happening? Is there any workaround? Thanks.

2014-06-25 02:09:58.530 13884 AUDIT nova.compute.manager
[req-cefb1f94-4685-4510-8cb6-4df472af06d0 c3b3e4719cd64dab8d46f2d8edac5fd1
dbf46e2c6ff0437dab6e1520381b20f6] [instance:
c48618bf-56c5-4a8d-8d9f-4ee9d88e0e94] Starting instance...
2014-06-25 02:09:58.612 13884 ERROR stevedore.extension [-] Could not load
'file': websockify>=0.5.1,<0.6
2014-06-25 02:09:58.612 13884 ERROR stevedore.extension [-]
websockify>=0.5.1,<0.6
2014-06-25 02:09:58.612 13884 TRACE stevedore.extension Traceback (most
recent call last):
2014-06-25 02:09:58.612 13884 TRACE stevedore.extension   File
"/usr/lib/python2.7/dist-packages/stevedore/extension.py", line 89, in
_load_plugins
2014-06-25 02:09:58.612 13884 TRACE stevedore.extension     invoke_kwds,
2014-06-25 02:09:58.612 13884 TRACE stevedore.extension   File
"/usr/lib/python2.7/dist-packages/stevedore/extension.py", line 101, in
_load_one_plugin
2014-06-25 02:09:58.612 13884 TRACE stevedore.extension     plugin =
ep.load()
2014-06-25 02:09:58.612 13884 TRACE stevedore.extension   File
"/usr/lib/python2.7/dist-packages/pkg_resources.py", line 1988, in load
2014-06-25 02:09:58.612 13884 TRACE stevedore.extension     if require:
self.require(env, installer)
2014-06-25 02:09:58.612 13884 TRACE stevedore.extension   File
"/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2001, in require
2014-06-25 02:09:58.612 13884 TRACE stevedore.extension
working_set.resolve(self.dist.requires(self.extras),env,installer))
2014-06-25 02:09:58.612 13884 TRACE stevedore.extension   File
"/usr/lib/python2.7/dist-packages/pkg_resources.py", line 584, in resolve
2014-06-25 02:09:58.612 13884 TRACE stevedore.extension     raise
DistributionNotFound(req)
2014-06-25 02:09:58.612 13884 TRACE stevedore.extension
DistributionNotFound: websockify>=0.5.1,<0.6
--
Regards,
Nagaraj
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