Deleting bucket and removing nodes from the cluster, leaves the node unstable

1. Install CB Server on 4 nodes
2. Create a bucket default
3. Create a cluster of 4 nodes
4. Add 1000 items to the cluster and verify the data is persisted.

Now as part of the cleanup
a. Bucket is deleted
Get 500 error:
2015-09-11 01:45:09 | INFO | MainProcess | test_thread | [bucket_helper.delete_all_buckets_or_assert] deleting existing buckets [u'default'] on 172.23.105.131
2015-09-11 01:45:09 | INFO | MainProcess | test_thread | [bucket_helper.delete_all_buckets_or_assert] remove bucket default ...
2015-09-11 01:45:39 | ERROR | MainProcess | test_thread | [rest_client._http_request] http://172.23.105.131:8091/pools/default/buckets/default error 500 reason: unknown

{"_":"Bucket deletion not yet complete, but will continue.\r\n"}

Seeing error:
2015-09-11 01:46:45 | INFO | MainProcess | test_thread | [rest_client.vbucket_map_ready] vbucket map is not ready for bucket default after waiting 60 seconds
2015-09-11 01:46:45 | ERROR | MainProcess | test_thread | [rest_client._http_request] http://172.23.105.131:8091/pools/default/buckets/default?basic_stats=true error 404 reason: status: 404, content: Requested resource not found.
Requested resource not found.
2015-09-11 01:46:45 | ERROR | MainProcess | test_thread | [rest_client._http_request] http://172.23.105.131:8091/pools/default/buckets/default?basic_stats=true error 404 reason: status: 404, content: Requested resource not found.
Requested resource not found.

Rebalancing to remove all nodes in the cluster:
2015-09-11 01:46:45 | INFO | MainProcess | test_thread | [rest_client.rebalance] rebalance params : password=password&ejectedNodes=ns_1%40172.23.105.182%2Cns_1%40172.23.105.210%2Cns_1%40172.23.105.132&user=Administrator&knownNodes=ns_1%40172.23.105.182%2Cns_1%40172.23.105.131%2Cns_1%40172.23.105.210%2Cns_1%40172.23.105.132
2015-09-11 01:46:45 | INFO | MainProcess | test_thread | [rest_client.rebalance] rebalance operation started
2015-09-11 01:46:45 | INFO | MainProcess | test_thread | [rest_client._rebalance_progress] rebalance percentage : 0.00 %
2015-09-11 01:46:55 | INFO | MainProcess | test_thread | [rest_client.monitorRebalance] rebalance progress took 10.0292150974 seconds
2015-09-11 01:46:55 | INFO | MainProcess | test_thread | [rest_client.monitorRebalance] sleep for 10 seconds after rebalance...
2015-09-11 01:47:35 | ERROR | MainProcess | test_thread | [cluster_helper.cleanup_cluster] 'pools' on node 172.23.105.182:8091 - [

{u'streamingUri': u'/poolsStreaming/default?uuid=05312a17f040add3c1a3c0f67bf5cf77', u'name': u'default', u'uri': u'/pools/default?uuid=05312a17f040add3c1a3c0f67bf5cf77'}

]
2015-09-11 01:47:35 | ERROR | MainProcess | test_thread | [rest_client._http_request] http://172.23.105.210:8091/nodes/self error 404 reason: unknown "Node is unknown to this cluster."
http://172.23.105.210:8091/nodes/self with status False: Node is unknown to this cluster.

If you access the nodes in cluster, you will see that you can login to the node but all everything shows - Difficulties communicating with the cluster; displaying cached information