apparent deadlock in ep-engine/bucket-engine (was: node_in is in pending state/ unable to restart cb service there/Rebalance exited with reason {not_all_nodes_are_ready_yet )

steps:
1)run data load ~12hours on source cluster http://172.23.105.156/
2) then start replication for all 4 buckets on destination nodes(172.23.105.159, 172.23.105.160, 172.23.105.206)
3) almost immediately after step#2 add 172.23.105.207 to destination cluster and rebalance

Rebalance exited with reason

{not_all_nodes_are_ready_yet, ['ns_1@172.23.105.207']}
ns_orchestrator002 ns_1@172.23.105.159 10:49:49 - Sun Aug 24, 2014
Started rebalancing bucket UserInfo ns_rebalancer000 ns_1@172.23.105.159 10:48:49 - Sun Aug 24, 2014
Starting rebalance, KeepNodes = ['ns_1@172.23.105.159','ns_1@172.23.105.160',
'ns_1@172.23.105.206','ns_1@172.23.105.207'], EjectNodes = [], Failed over and being ejected nodes = []; no delta recovery nodes
ns_orchestrator004 ns_1@172.23.105.159 10:48:49 - Sun Aug 24, 2014
Control connection to memcached on 'ns_1@172.23.105.207' disconnected: {{badmatch,
{error,
timeout}},
[{mc_client_binary,
cmd_vocal_recv,
5,
[{file, "src/mc_client_binary.erl"}, {line, 151}]},
{mc_client_binary,
select_bucket,
2,
[{file, "src/mc_client_binary.erl"}, {line, 346}]},
{ns_memcached,
ensure_bucket,
2,
[{file, "src/ns_memcached.erl"}, {line, 1269}]},
{ns_memcached,
handle_info,
2,
[{file, "src/ns_memcached.erl"}, {line, 744}]},
{gen_server,
handle_msg,
5,
[{file, "gen_server.erl"}, {line, 604}]},
{ns_memcached,
init,
1,
[{file, "src/ns_memcached.erl"}, {line, 171}]},
{gen_server,
init_it,
6,
[{file, "gen_server.erl"}, {line, 304}]},
{proc_lib,
init_p_do_apply,
3,
[{file, "proc_lib.erl"}, {line, 239}]}]} (repeated 1 times) ns_memcached000 ns_1@172.23.105.207 10:44:42 - Sun Aug 24, 2014
Control connection to memcached on 'ns_1@172.23.105.207' disconnected: {{badmatch,
{error,
timeout}},
[{mc_client_binary,
cmd_vocal_recv,
5,
[{file, "src/mc_client_binary.erl"}, {line, 151}]},
{mc_client_binary,
select_bucket,
2,
[{file, "src/mc_client_binary.erl"},{line, 346}]},
{ns_memcached,
ensure_bucket,
2,
[{file, "src/ns_memcached.erl"}, {line, 1269}]},
{ns_memcached,
handle_info,
2,
[{file, "src/ns_memcached.erl"}, {line, 744}]},
{gen_server,
handle_msg,
5,
[{file, "gen_server.erl"}, {line, 604}]},
{ns_memcached,
init,
1,
[{file, "src/ns_memcached.erl"}, {line, 171}]},
{gen_server,
init_it,
6,
[{file, "gen_server.erl"}, {line, 304}]},
{proc_lib,
init_p_do_apply,
3,
[{file, "proc_lib.erl"}, {line, 239}]}]} ns_memcached000 ns_1@172.23.105.207 10:43:56 - Sun Aug 24, 2014
Rebalance exited with reason {not_all_nodes_are_ready_yet, ['ns_1@172.23.105.207']}

trying to restart 172.23.105.207 node(firewall is turn off there):

[root@centos-64-x64 logs]# /etc/init.d/couchbase-server status
couchbase-server is running
[root@centos-64-x64 logs]# /etc/init.d/couchbase-server restart
Stopping couchbase-server
^C
BREAK: (a)bort (c)ontinue (p)roc info (i)nfo (l)oaded
(v)ersion (k)ill (D)b-tables (d)istribution
a
[ OK ]
Starting couchbase-server [ OK ]
[root@centos-64-x64 logs]# /etc/init.d/couchbase-server status
couchbase-server is running
[root@centos-64-x64 logs]# /etc/init.d/couchbase-server stop
Stopping couchbase-serverNOTE: shutdown failed

{badrpc,nodedown}

[FAILED]
[root@centos-64-x64 logs]# /etc/init.d/couchbase-server start
couchbase-server is already started [WARNING]

cluster will be available a few hours