Ceilometer meter-list always provides empty list.

[root@controller1 ~ (admin)]# IMAGE_ID=$(glance image-list | grep 'cirros' | awk '{ print $2 }')
[root@controller1 ~ (admin)]# glance image-download $IMAGE_ID > /tmp/cirros.img
You have new mail in /var/spool/mail/root
[root@controller1 ~ (admin)]# ceilometer meter-list
+------+------+------+-------------+---------+------------+
| Name | Type | Unit | Resource ID | User ID | Project ID |
+------+------+------+-------------+---------+------------+
+------+------+------+-------------+---------+------------+

I am using mongodb as the backend in OpenStack (Ocata). Mongodb don't have any data.

> show dbs
admin       0.000GB
ceilometer  0.000GB
local       0.000GB
> use ceilometer
switched to db ceilometer
> db
ceilometer
> show collections
meter
resource
> show dbs
admin       0.000GB
ceilometer  0.000GB
local       0.000GB
> show profile
db.system.profile is empty
Use db.setProfilingLevel(2) will enable profiling
Use db.system.profile.find() to show raw profile entries
> show collections
meter
resource
> db.meter.find()
> show collections
meter
resource
> db.resource.find()
>

I have provided /etc/ceilometer/ceilometer.conf below

[root@controller1 ~ (admin)]# cat /etc/ceilometer/ceilometer.conf
[DEFAULT]
auth_strategy = keystone
transport_url = rabbit://openstack:RABBIT_PASS@10.0.0.11
meter_dispatcher=database


[database]
connection = mongodb://ceilometer:CEILOMETER_DBPASS@10.0.0.33:27017/ceilometer

[keystone_authtoken]
auth_uri = http://10.0.0.11:5000
auth_url = http://10.0.0.11:35357
memcached_servers = 10.0.0.12:11211,10.0.0.13:11211,10.0.0.14:11211
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = ceilometer
password = CEILOMETER_PASS
service_token_roles_required = true

[service_credentials]
auth_type = password
auth_url = http://10.0.0.11:5000/v3
project_domain_name = default
user_domain_name = default
project_name = service
username = ceilometer
password = CEILOMETER_PASS
interface = internalURL
region_name = RegionOne

What could be the issue?