Recent CQ runs have been showing an error message during
the CommitQueueCompletion stage:

15:28:51: INFO: Running cidb query on pid 18401, repr(query) starts with <sqlalchemy.sql.expression.Insert object at 0x7f6e58f7df50>
15:28:51: ERROR: unexpected error error(111, 'Connection refused') while sending data
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/statsd/connection.py", line 77, in send
    self.udp_sock.send(send_data)
error: [Errno 111] Connection refused

The message is (apparently) innocuous, but it shouldn't
be happening at all.  We should find where this is coming
from, and squash it in some appropriate manner.