Hi, I am working on OpenStack integration with ACI, but getting nuetron-server problem to start. here is the details

     [root@juno-controller-ali ~(keystone_admin)]# **openstack-service status neutron**
        neutron-dhcp-agent (pid 27958) is active
        neutron-l3-agent (pid 27956) is active
        neutron-metadata-agent (pid 27966) is active
        neutron-openvswitch-agent (pid 27986) is active
        **neutron-server (pid 0) is failed**

        **systemctl start neutron-server.service**
        ob for neutron-server.service failed. See 'systemctl status neutron-server.service' and 'journalctl -xn' for details.

        root@juno-controller-ali ~(keystone_admin)]# journalctl -xn
        Dec 09 07:00:15 juno-controller-ali sudo[24718]: neutron : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/bin/neutron-rootwrap /etc/neutron/rootwrap.conf ovs-ofctl dump-flo
        Dec 09 07:00:17 juno-controller-ali sudo[24721]: neutron : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/bin/neutron-rootwrap /etc/neutron/rootwrap.conf ovs-ofctl dump-flo
        Dec 09 07:00:19 juno-controller-ali sudo[24724]: neutron : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/bin/neutron-rootwrap /etc/neutron/rootwrap.conf ovs-ofctl dump-flo
        Dec 09 07:00:21 juno-controller-ali sudo[24729]: neutron : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/bin/neutron-rootwrap /etc/neutron/rootwrap.conf ovs-ofctl dump-flo
        Dec 09 07:00:23 juno-controller-ali sudo[24732]: neutron : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/bin/neutron-rootwrap /etc/neutron/rootwrap.conf ovs-ofctl dump-flo
        Dec 09 07:00:25 juno-controller-ali sudo[24735]: neutron : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/bin/neutron-rootwrap /etc/neutron/rootwrap.conf ovs-ofctl dump-flo
        Dec 09 07:00:25 juno-controller-ali cinder-volume[2272]: 2015-12-09 07:00:25.859 2892 WARNING **cinder.volume.manager [-] Unable to update stats, LVMISCSIDriver -2.0.0  d
        Dec 09 07:00:25 juno-controller-ali cinder-volume[2272]: 2015-12-09 07:00:25.860 2892 WARNING cinder.volume.manager [-] Unable to update volume replication status, LVMI**
        Dec 09 07:00:27 juno-controller-ali sudo[24738]: neutron : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/bin/neutron-rootwrap /etc/neutron/rootwrap.conf ovs-ofctl dump-flo
        Dec 09 07:00:29 juno-controller-ali sudo[24741]: neutron : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/bin/neutron-rootwrap /etc/neutron/rootwrap.conf ovs-ofctl dump-flo

        [root@juno-controller-ali ~(keystone_admin)]# neutron agent-list
        Unable to establish connection to http://10.3.1.175:9696/v2.0/agents.json

        [root@juno-controller-ali ~(keystone_admin)]# **tail -f /var/log/neutron/server.log**
        2015-12-09 07:06:23.336 25418 TRACE neutron   File "/usr/lib/python2.7/site-packages/requests/models.py", line 802, in json
        2015-12-09 07:06:23.336 25418 TRACE neutron     return json.loads(self.text, **kwargs)
        2015-12-09 07:06:23.336 25418 TRACE neutron   File "/usr/lib64/python2.7/site-packages/simplejson/__init__.py", line 488, in loads
        2015-12-09 07:06:23.336 25418 TRACE neutron     return _default_decoder.decode(s)
        2015-12-09 07:06:23.336 25418 TRACE neutron   File "/usr/lib64/python2.7/site-packages/simplejson/decoder.py", line 370, in decode
        2015-12-09 07:06:23.336 25418 TRACE neutron     obj, end = self.raw_decode(s)
        2015-12-09 07:06:23.336 25418 TRACE neutron   File "/usr/lib64/python2.7/site-packages/simplejson/decoder.py", line 389, in raw_decode
        2015-12-09 07:06:23.336 25418 TRACE neutron     return self.scan_once(s, idx=_w(s, idx).end())
        2015-12-09 07:06:23.336 25418 TRACE neutron JSONDecodeError: Expecting value: line 1 column 1 (char 0)
        2015-12-09 07:06 ...