'Connection' object has no attribute 'cluster'

# openstack cluster list
'Connection' object has no attribute 'cluster'

debug log

# openstack --debug cluster list
.....
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/osc_lib/shell.py", line 134, in run
    ret_val = super(OpenStackShell, self).run(argv)
  File "/usr/lib/python2.7/site-packages/cliff/app.py", line 279, in run
    result = self.run_subcommand(remainder)
  File "/usr/lib/python2.7/site-packages/osc_lib/shell.py", line 169, in run_subcommand
    ret_value = super(OpenStackShell, self).run_subcommand(argv)
  File "/usr/lib/python2.7/site-packages/cliff/app.py", line 400, in run_subcommand
    result = cmd.run(parsed_args)
  File "/usr/lib/python2.7/site-packages/osc_lib/command/command.py", line 41, in run
    return super(Command, self).run(parsed_args)
  File "/usr/lib/python2.7/site-packages/cliff/display.py", line 113, in run
    column_names, data = self.take_action(parsed_args)
  File "/usr/lib/python2.7/site-packages/senlinclient/v1/cluster.py", line 86, in take_action
    senlin_client = self.app.client_manager.clustering
  File "/usr/lib/python2.7/site-packages/osc_lib/clientmanager.py", line 60, in __get__
    six.reraise(new_err.__class__, new_err, sys.exc_info()[2])
  File "/usr/lib/python2.7/site-packages/osc_lib/clientmanager.py", line 55, in __get__
    self._handle = self.factory(instance)
  File "/usr/lib/python2.7/site-packages/senlinclient/plugin.py", line 38, in make_client
    conn.cluster)
PluginAttributeError: 'Connection' object has no attribute 'cluster'