can not start cluster
when I start a cluster, sometimes it can be turn to active state, but sometimes it throws an error as follows:
2013-08-09 10:35:53.936 23506 WARNING savanna.service.instances [-] Can't start cluster 'asd' (reason: [Errno 111] ECONNREFUSED) 2013-08-09 10:35:53.939 23506 WARNING savanna.plugins.vanilla.config_helper [-] Plugin recieved wrong applicable target 'general' for xml configs 2013-08-09 10:35:53.941 23506 WARNING savanna.plugins.vanilla.config_helper [-] Plugin recieved wrong applicable target 'general' in environmental configs 2013-08-09 10:35:53.941 23506 WARNING savanna.plugins.vanilla.config_helper [-] Plugin recieved wrong applicable target 'general' for xml configs 2013-08-09 10:35:53.942 23506 WARNING savanna.plugins.vanilla.config_helper [-] Plugin recieved wrong applicable target 'general' in environmental configs Traceback (most recent call last): File "/usr/local/lib/python2.7/dist-packages/eventlet-0.13.0-py2.7.egg/eventlet/hubs/poll.py", line 99, in wait writers.get(fileno, noop).cb(fileno) File "/usr/local/lib/python2.7/dist-packages/eventlet-0.13.0-py2.7.egg/eventlet/greenthread.py", line 194, in main result = function(args, *kwargs) File "/usr/local/lib/python2.7/dist-packages/savanna-0.2.1-py2.7.egg/savanna/context.py", line 127, in wrapper func(args, *kwargs) File "/usr/local/lib/python2.7/dist-packages/savanna-0.2.1-py2.7.egg/savanna/service/api.py", line 115, in _provision_cluster plugin.configure_cluster(cluster) File "/usr/local/lib/python2.7/dist-packages/savanna-0.2.1-py2.7.egg/savanna/plugins/vanilla/plugin.py", line 81, in configure_cluster self._push_configs_to_nodes(cluster) File "/usr/local/lib/python2.7/dist-packages/savanna-0.2.1-py2.7.egg/savanna/plugins/vanilla/plugin.py", line 192, in _push_configs_to_nodes 'sudo chown -R $USER:$USER /etc/hadoop' File "/usr/local/lib/python2.7/dist-packages/savanna-0.2.1-py2.7.egg/savanna/utils/remote.py", line 142, in execute_command return execute_command(self.ssh_connection(), cmd) File "/usr/local/lib/python2.7/dist-packages/savanna-0.2.1-py2.7.egg/savanna/utils/remote.py", line 133, in ssh_connection self._ssh = self.helper.ssh_connection() File "/usr/local/lib/python2.7/dist-packages/savanna-0.2.1-py2.7.egg/savanna/utils/remote.py", line 96, in ssh_connection self.instance.node_group.cluster.private_key) File "/usr/local/lib/python2.7/dist-packages/savanna-0.2.1-py2.7.egg/savanna/utils/remote.py", line 31, in setup_ssh_connection ssh.connect(host, username=username, pkey=private_key) File "/usr/local/lib/python2.7/dist-packages/paramiko-1.11.0-py2.7.egg/paramiko/client.py", line 305, in connect retry_on_signal(lambda: sock.connect(addr)) File "/usr/local/lib/python2.7/dist-packages/paramiko-1.11.0-py2.7.egg/paramiko/util.py", line 278, in retry_on_signal return function() File "/usr/local/lib/python2.7/dist-packages/paramiko-1.11.0-py2.7.egg/paramiko/client.py", line 305, in <lambda> retry_on_signal(lambda: sock.connect(addr)) File "/usr/local/lib/python2.7/dist-packages/eventlet-0.13.0-py2.7.egg/eventlet/greenio.py", line 194, in connect socket_checkerr(fd) File "/usr/local/lib/python2.7/dist-packages/eventlet-0.13.0-py2.7.egg/eventlet/greenio.py", line 46, in socket_checkerr raise socket.error(err, errno.errorcode[err]) error: [Errno 111] ECONNREFUSED Removing descriptor: 5