starcluster

!!! ERROR - Error occured while running plugin 'starcluster.clustersetup.DefaultClusterSetup':
!!! ERROR - Unhandled exception occured
Traceback (most recent call last):
  File "/usr/anaconda/lib/python2.7/site-packages/starcluster/cli.py", line 274, in main
    sc.execute(args)
  File "/usr/anaconda/lib/python2.7/site-packages/starcluster/commands/start.py", line 244, in execute
    validate_running=validate_running)
  File "/usr/anaconda/lib/python2.7/site-packages/starcluster/cluster.py", line 1628, in start
    return self._start(create=create, create_only=create_only)
  File "<string>", line 2, in _start
  File "/usr/anaconda/lib/python2.7/site-packages/starcluster/utils.py", line 112, in wrap_f
    res = func(*arg, **kargs)
  File "/usr/anaconda/lib/python2.7/site-packages/starcluster/cluster.py", line 1651, in _start
    self.setup_cluster()
  File "/usr/anaconda/lib/python2.7/site-packages/starcluster/cluster.py", line 1660, in setup_cluster
    self._setup_cluster()
  File "<string>", line 2, in _setup_cluster
  File "/usr/anaconda/lib/python2.7/site-packages/starcluster/utils.py", line 112, in wrap_f
    res = func(*arg, **kargs)
  File "/usr/anaconda/lib/python2.7/site-packages/starcluster/cluster.py", line 1672, in _setup_cluster
    self.run_plugins()
  File "/usr/anaconda/lib/python2.7/site-packages/starcluster/cluster.py", line 1690, in run_plugins
    self.run_plugin(plug, method_name=method_name, node=node)
  File "/usr/anaconda/lib/python2.7/site-packages/starcluster/cluster.py", line 1715, in run_plugin
    func(*args)
  File "/usr/anaconda/lib/python2.7/site-packages/starcluster/clustersetup.py", line 382, in run
    self._setup_nfs()
  File "<string>", line 2, in _setup_nfs
  File "/usr/anaconda/lib/python2.7/site-packages/starcluster/utils.py", line 112, in wrap_f
    res = func(*arg, **kargs)
  File "/usr/anaconda/lib/python2.7/site-packages/starcluster/clustersetup.py", line 365, in _setup_nfs
    master.start_nfs_server()
  File "/usr/anaconda/lib/python2.7/site-packages/starcluster/node.py", line 717, in start_nfs_server
    with self.ssh.remote_file(DUMMY_EXPORT_FILE, 'w') as dummyf:
AttributeError: __exit__