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Hi,

When I try to create a big hadoop cluster (21 nodes), sometimes I am getting this error: 

2013-12-05 12:17:57.920 29553 ERROR savanna.context [-] Thread 'cluster-creating-8d093d9b-c675-4222-b53a-3319d54bc61f' fails with exception: 'This request was rate-limited. (HTTP 413)'
2013-12-05 12:17:57.920 29553 TRACE savanna.context Traceback (most recent call last):
2013-12-05 12:17:57.920 29553 TRACE savanna.context   File "/root/savanna/savanna/context.py", line 128, in wrapper
2013-12-05 12:17:57.920 29553 TRACE savanna.context     func(*args, **kwargs)
2013-12-05 12:17:57.920 29553 TRACE savanna.context   File "/root/savanna/savanna/service/api.py", line 123, in _provision_cluster
2013-12-05 12:17:57.920 29553 TRACE savanna.context     i.create_cluster(cluster)
2013-12-05 12:17:57.920 29553 TRACE savanna.context   File "/root/savanna/savanna/service/instances.py", line 56, in create_cluster
2013-12-05 12:17:57.920 29553 TRACE savanna.context     _rollback_cluster_creation(cluster, ex)
2013-12-05 12:17:57.920 29553 TRACE savanna.context   File "/usr/lib64/python2.6/contextlib.py", line 23, in __exit__
2013-12-05 12:17:57.920 29553 TRACE savanna.context     self.gen.next()
2013-12-05 12:17:57.920 29553 TRACE savanna.context   File "/root/savanna/savanna/service/instances.py", line 36, in create_cluster
2013-12-05 12:17:57.920 29553 TRACE savanna.context     _create_instances(cluster)
2013-12-05 12:17:57.920 29553 TRACE savanna.context   File "/root/savanna/savanna/service/instances.py", line 111, in _create_instances
2013-12-05 12:17:57.920 29553 TRACE savanna.context     _run_instance(cluster, node_group, idx, aa_groups, userdata)
2013-12-05 12:17:57.920 29553 TRACE savanna.context   File "/root/savanna/savanna/service/instances.py", line 173, in _run_instance
2013-12-05 12:17:57.920 29553 TRACE savanna.context     key_name=cluster.user_keypair_id)
2013-12-05 12:17:57.920 29553 TRACE savanna.context   File "/root/savanna/.tox/venv/lib/python2.6/site-packages/novaclient/v1_1/servers.py", line 658, in create
2013-12-05 12:17:57.920 29553 TRACE savanna.context     **boot_kwargs)
2013-12-05 12:17:57.920 29553 TRACE savanna.context   File "/root/savanna/.tox/venv/lib/python2.6/site-packages/novaclient/base.py", line 402, in _boot
2013-12-05 12:17:57.920 29553 TRACE savanna.context     return_raw=return_raw, **kwargs)
2013-12-05 12:17:57.920 29553 TRACE savanna.context   File "/root/savanna/.tox/venv/lib/python2.6/site-packages/novaclient/base.py", line 145, in _create
2013-12-05 12:17:57.920 29553 TRACE savanna.context     _resp, body = self.api.client.post(url, body=body)
2013-12-05 12:17:57.920 29553 TRACE savanna.context   File "/root/savanna/.tox/venv/lib/python2.6/site-packages/novaclient/client.py", line 232, in post
2013-12-05 12:17:57.920 29553 TRACE savanna.context     return self._cs_request(url, 'POST', **kwargs)
2013-12-05 12:17:57.920 29553 TRACE savanna.context   File "/root/savanna/.tox/venv/lib/python2.6/site-packages/novaclient/client.py", line 213, in _cs_request
2013-12-05 12:17:57.920 29553 TRACE savanna.context     **kwargs)
2013-12-05 12:17:57.920 29553 TRACE savanna.context   File "/root/savanna/.tox/venv/lib/python2.6/site-packages/novaclient/client.py", line 195, in _time_request
2013-12-05 12:17:57.920 29553 TRACE savanna.context     resp, body = self.request(url, method, **kwargs)
2013-12-05 12:17:57.920 29553 TRACE savanna.context   File "/root/savanna/.tox/venv/lib/python2.6/site-packages/novaclient/client.py", line 189, in request
2013-12-05 12:17:57.920 29553 TRACE savanna.context     raise exceptions.from_response(resp, body, url, method)
2013-12-05 12:17:57.920 29553 TRACE savanna.context OverLimit: This request was rate-limited. (HTTP 413)
2013-12-05 12:17:57.920 29553 TRACE savanna.context 

How I can prevent this to happen? Any help will be highly appreciated.

Regards,

Arindam
 		 	   		  
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