Comment 1 for bug 1553250

I have seen the same with ceilometer coordination:

2016-03-01 17:15:52.914 21350 ERROR ceilometer.coordination Traceback (most recent call last):
2016-03-01 17:15:52.914 21350 ERROR ceilometer.coordination File "/usr/lib/python2.7/site-packages/ceilometer/coordination.py", line 113, in heartbeat
2016-03-01 17:15:52.914 21350 ERROR ceilometer.coordination self._coordinator.heartbeat()
2016-03-01 17:15:52.914 21350 ERROR ceilometer.coordination File "/usr/lib/python2.7/site-packages/tooz/drivers/redis.py", line 507, in heartbeat
2016-03-01 17:15:52.914 21350 ERROR ceilometer.coordination value=self.STILL_ALIVE)
2016-03-01 17:15:52.914 21350 ERROR ceilometer.coordination File "/usr/lib64/python2.7/contextlib.py", line 35, in __exit__
2016-03-01 17:15:52.914 21350 ERROR ceilometer.coordination self.gen.throw(type, value, traceback)
2016-03-01 17:15:52.914 21350 ERROR ceilometer.coordination File "/usr/lib/python2.7/site-packages/tooz/drivers/redis.py", line 51, in _translate_failures
2016-03-01 17:15:52.914 21350 ERROR ceilometer.coordination cause=e)
2016-03-01 17:15:52.914 21350 ERROR ceilometer.coordination File "/usr/lib/python2.7/site-packages/tooz/coordination.py", line 666, in raise_with_cause
2016-03-01 17:15:52.914 21350 ERROR ceilometer.coordination excutils.raise_with_cause(exc_cls, message, *args, **kwargs)
2016-03-01 17:15:52.914 21350 ERROR ceilometer.coordination File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 143, in raise_with_cause
2016-03-01 17:15:52.914 21350 ERROR ceilometer.coordination six.raise_from(exc_cls(message, *args, **kwargs), kwargs.get('cause'))
2016-03-01 17:15:52.914 21350 ERROR ceilometer.coordination File "/usr/lib/python2.7/site-packages/six.py", line 692, in raise_from
2016-03-01 17:15:52.914 21350 ERROR ceilometer.coordination raise value
2016-03-01 17:15:52.914 21350 ERROR ceilometer.coordination ToozConnectionError: Error 113 connecting to 192.0.2.7:6379. No route to host.
2016-03-01 17:15:52.914 21350 ERROR ceilometer.coordination
2016-03-01 17:15:52.915 21350 WARNING oslo.service.loopingcall [req-0a608ba0-7974-4aec-bf73-5f3655da1e88 admin - - - -] Function 'ceilometer.coordination.PartitionCoordinator.heartbeat' run outlasted interval by 10.95 sec
2016-03-01 17:15:58.924 21350 ERROR ceilometer.coordination [req-0a608ba0-7974-4aec-bf73-5f3655da1e88 admin - - - -] Error connecting to coordination backend.

tooz configuration seems to be the issue here?