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[Mohammed Amine SAYA <asaya.openstack@xxxxxxxxx>]

After many hours investigating sign in error in horizon, I found the last
line responsible for this issue in /var/log/apache2/error.log :

[Sat Mar 09 01:12:18 2013] [error]   File
"/usr/lib/python2.7/dist-packages/novaclient/client.py", line 195, in
request
[Sat Mar 09 01:12:18 2013] [error]     raise
exceptions.ConnectionRefused(body)
[Sat Mar 09 01:12:18 2013] [error] ConnectionRefused: ConnectionRefused:
'[Errno 111] Connection refused'

And after dumping /var/log/nova/nova-api.log I found this :

 2013-03-09 02:26:45 28553 TRACE nova.service ProcessExecutionError:
Unexpected error while running command.
2013-03-09 02:26:45 28553 TRACE nova.service Command: sudo nova-rootwrap
/etc/nova/rootwrap.conf iptables-save -c -t nat
2013-03-09 02:26:45 28553 TRACE nova.service Exit code: 1
2013-03-09 02:26:45 28553 TRACE nova.service Stdout: ''
2013-03-09 02:26:45 28553 TRACE nova.service Stderr: 'iptables-save
v1.4.14: Cannot initialize: Table does not exist (do you need to
insmod?)\n\n'
2013-03-09 02:26:45 28553 TRACE nova.service
2013-03-09 02:26:45 28553 INFO nova.wsgi [-] Stopping WSGI server.
2013-03-09 02:26:45 12072 INFO nova.service [-] Child 28553 exited with
status 2
2013-03-09 02:26:45 12072 INFO nova.service [-] Started child 28606


Do you think this issue with nova is responsible for breaking dashboard?

Any help will be appreciated.

Thanks a lot.
Amine.