incremental_rebalance_in_with_queries: Rebalance exited with reason bad_replicas(Bad replicators after rebalance)

http://qa.hq.northscale.net/job/centos-64-2.0-basic-rebalance-tests-P0/422/consoleFull
./testrunner -i /tmp/rebalance-tests.ini wait_timeout=180,GROUP=P0,get-cbcollect-info=True,stop-on-failure=True -t rebalance.rebalancein.RebalanceInTests.incremental_rebalance_in_with_queries,blob_generator=False,items=1000000,max_verify=100000,GROUP=IN;P0;FROM_2_0

[2013-04-22 02:53:54,720] - [rest_client:984] INFO - Latest logs from UI:
[2013-04-22 02:53:54,805] - [rest_client:985] ERROR -

{u'node': u'ns_1@10.5.2.13', u'code': 2, u'text': u'Rebalance exited with reason bad_replicas\n', u'shortText': u'message', u'module': u'ns_orchestrator', u'tstamp': 1366624419114, u'type': u'info'}

[2013-04-22 02:53:54,805] - [rest_client:985] ERROR - {u'node': u'ns_1@10.5.2.13', u'code': 2, u'text': u"Bad replicators after rebalance:\nMissing = [

{'ns_1@10.3.121.64','ns_1@10.3.121.69',491}

]\nExtras = []", u'shortText': u'message', u'module': u'ns_rebalancer', u'tstamp': 1366624419113, u'type': u'info'}