[system test]rebalance failure due to bad replicators after rebalance

Install couchbase server 2.0.1-185 on 9 windows ssd vms.
Create a cluster with 7 nodes
10.3.121.173
10.3.121.169
10.3.121.171
10.3.3.214
10.3.121.47
10.3.3.180
10.3.3.181

Create 2 buckets:
"buckets" : {"default" :

{"quota": "3500 MB", "replicas": "1", "replica_index": "enable"}

,
"sasl": {"count": "1", "quota": "2000MB", "replicas": "1", "replica_index": "disable"}}

Create 2 design docs:
"ddocs" : {"create": [{"ddoc":"ddoc1", "view":"view1", "map":"function(doc,meta)

{emit(doc.city,null);}", "bucket":"default"},
{"ddoc":"ddoc1", "view":"view2", "map":"function(doc,meta){emit(doc.city, [doc.st, doc.email]);}", "bucket":"default"},
{"ddoc":"ddoc2", "view":"view1", "map":"function(doc,meta){emit(doc.city,null);}

", "bucket":"saslbucket"},
{"ddoc":"ddoc2", "view":"view2", "map":"function(doc,meta)

{emit(doc.city, [doc.st, doc.email]);}

", "bucket":"saslbucket"}]}

no xdcr created

Load 20+ million items to both bucket until resident ratio on both bucket around 70%
Access cluster in 3 hours with spec in this page and run query with 200~500 ops per second on both buckets
5% expire - 5% delete - 5% add - 5% update , 80% gets - 3 hours access phase for default
70% expire - 20% delete - 5% add - 5% gets - 3 hours access phase for saslbucket

Then the test go through a "swap rebalance the orchestrator node" phase and a "rebalance in one node" phase
In "rebalance out one node" phase, rebalance failed with error:

Started rebalancing bucket saslbucket ns_rebalancer000 ns_1@10.3.121.171 03:42:54 - Sat Mar 30, 2013
Starting rebalance, KeepNodes = ['ns_1@10.3.3.181','ns_1@10.3.121.243',
'ns_1@10.3.121.47','ns_1@10.3.3.182',
'ns_1@10.3.3.214','ns_1@10.3.121.171',
'ns_1@10.3.121.169'], EjectNodes = ['ns_1@10.3.121.173']
ns_orchestrator004 ns_1@10.3.121.171 03:42:54 - Sat Mar 30, 2013

Bad replicators after rebalance:
Missing = [

{'ns_1@10.3.121.171','ns_1@10.3.3.181',173}

,

{'ns_1@10.3.121.171','ns_1@10.3.3.181',174}

,

{'ns_1@10.3.121.171','ns_1@10.3.3.181',175}

,

{'ns_1@10.3.121.171','ns_1@10.3.3.181',176}

,

{'ns_1@10.3.121.171','ns_1@10.3.3.181',177}

,

{'ns_1@10.3.121.171','ns_1@10.3.3.181',178}

,

{'ns_1@10.3.121.171','ns_1@10.3.3.181',246}

,

{'ns_1@10.3.121.171','ns_1@10.3.3.181',247}

,

{'ns_1@10.3.121.171','ns_1@10.3.3.181',248}

,

{'ns_1@10.3.121.171','ns_1@10.3.3.181',249}

,

{'ns_1@10.3.121.171','ns_1@10.3.3.181',250}

,

{'ns_1@10.3.121.171','ns_1@10.3.3.181',251}

,

{'ns_1@10.3.121.171','ns_1@10.3.3.181',252}

,

{'ns_1@10.3.121.171','ns_1@10.3.3.181',253}

,

{'ns_1@10.3.121.171','ns_1@10.3.3.181',254}

,

{'ns_1@10.3.121.171','ns_1@10.3.3.181',255}

,

{'ns_1@10.3.121.171','ns_1@10.3.3.181',256}

,

{'ns_1@10.3.121.171','ns_1@10.3.3.181',257}

,

{'ns_1@10.3.121.171','ns_1@10.3.3.181',258}

,

{'ns_1@10.3.121.171','ns_1@10.3.3.181',259}

,

{'ns_1@10.3.121.171','ns_1@10.3.3.181',260}

,

{'ns_1@10.3.121.171','ns_1@10.3.3.181',261}

,

{'ns_1@10.3.121.171','ns_1@10.3.3.181',262}

,

{'ns_1@10.3.121.171','ns_1@10.3.3.181',263}

]
Extras = [] ns_rebalancer002 ns_1@10.3.121.171 06:18:36 - Sat Mar 30, 2013
Rebalance exited with reason bad_replicas ns_orchestrator002 ns_1@10.3.121.171 06:18:36 - Sat Mar 30, 2013
Shutting down bucket "saslbucket" on 'ns_1@10.3.121.173' for deletion ns_memcached002 ns_1@10.3.121.173 06:18:37 - Sat Mar 30, 2013

Link to manifest file of this build http://builds.hq.northscale.net/latestbuilds/couchbase-server-community_x86_64_2.0.1-185-rel.setup.exe.manifest.xml

Diags link https://s3.amazonaws.com/bugdb/jira/9ssd-win2.0.1-185-ns-diag-20130330.txt.zip