kubernetes failure on first attempt to register minion

gistfile1.txt

2014-10-26 02:33:12 INFO network-relation-changed Registering machine
2014-10-26 02:33:12 INFO network-relation-changed registration request 
{'kind': 'Minion', 'id': u'10.132.218.156', 
 'resources': {'capacity': {'mem': '2049988 K', 'cpu': 2}}, 'hostIP': u'10.132.218.156'}

2014-10-26 02:33:12 INFO network-relation-changed registration result
 {"kind":"Status","creationTimestamp":null,"selfLink":"/api/v1beta1/minions",
 "apiVersion":"v1beta1","status":"Failure",
 "message":"The requested resource does not exist.",
 "code":500}

rerunning the registration (exact same request) and it gets success

2014-10-26 02:34:56 INFO network-relation-changed Registering machine
2014-10-26 02:34:56 INFO network-relation-changed registration request 
 {'kind': 'Minion', 'id': u'10.132.218.156', 
 'resources': {'capacity': {'mem': '2049988 K', 'cpu': 2}}, 'hostIP': u'10.132.218.156'}
2014-10-26 02:34:56 INFO network-relation-changed registered

at first i thought it timing k8s apiserver initialization dependent, but it
happens on other new minions.