masakari-api failed to launch due to setting of watch_log_file and log_file

I added the following settings to /etc/masakari/masakari.conf.
--
log_file = /var/log/masakari/masakari.log
watch_log_file = true
--

And then I failed to launch masakari-api with above settings.
Masakari-api output error logs as follows:

$ masakari-api
Config option database.idle_timeout is deprecated. Use option database.connection_recycle_time instead.
Traceback (most recent call last):
  File "/usr/local/bin/masakari-api", line 10, in <module>
    sys.exit(main())
  File "/usr/local/lib/python2.7/dist-packages/masakari/cmd/api.py", line 37, in main
    logging.setup(CONF, "masakari")
  File "/usr/local/lib/python2.7/dist-packages/oslo_log/log.py", line 264, in setup
    _setup_logging_from_conf(conf, product_name, version)
  File "/usr/local/lib/python2.7/dist-packages/oslo_log/log.py", line 353, in _setup_logging_from_conf
    filelog = file_handler(logpath)
  File "/usr/local/lib/python2.7/dist-packages/oslo_log/watchers.py", line 75, in __init__
    self._watch_file()
  File "/usr/local/lib/python2.7/dist-packages/oslo_log/watchers.py", line 86, in _watch_file
    timeout=FastWatchedFileHandler.TIMEOUT)
  File "/usr/local/lib/python2.7/dist-packages/pyinotify.py", line 1461, in __init__
    threshold, timeout)
  File "/usr/local/lib/python2.7/dist-packages/pyinotify.py", line 1138, in __init__
    self._pollobj = select.poll()
AttributeError: 'module' object has no attribute 'poll'
$

[Impact on other projects]
watch_log_file and log_file are configuration options of oslo.log.
So I tried to set same options for nova-compute.
As a result, same issue occurred in the nova-compute process.

There is a possibility that this issue affects all openstack projects using oslo.log.

[Caus of bug]
I think the root cause of this isse is the following bug of pyinotify.
pyinotify is used by oslo.log.
But this pull requests is not merged yet.
https://github.com/seb-m/pyinotify/pull/117