Rebalance failing on latest 2.0 build due to wait_for_memcached failures (ns_rebalancer:wait_for_memcached)

The latest test run, failed with rebalance failures. This is a regression from the previous test runs. No cores files generated.

http://qa.hq.northscale.net/job/centos-64-view-tests/317/

From the logs
[rebalance:info] [2012-02-07 2:01:50] [ns_1@10.1.2.30:<0.4598.3>:ns_rebalancer:wait_for_memcached:296] Waiting for ['ns_1@10.1.2.30']
[user:info] [2012-02-07 2:01:50] [ns_1@10.1.2.30:<0.317.0>:ns_orchestrator:handle_info:234] Rebalance exited with reason

{wait_for_memcached_failed, "default", ['ns_1@10.1.2.30']}

[ns_server:info] [2012-02-07 2:01:50] [ns_1@10.1.2.30:ns_log:ns_log:handle_cast:115] suppressing duplicate log ns_orchestrator:2("Rebalance exited with reason

{wait_for_memcached_failed,\"default\",\n ['ns_1@10.1.2.30']}

\n") because it's been seen 1 times in the past 254.737081 secs (last seen 254.737081 secs ago
[ns_server:info] [2012-02-07 2:01:50] [ns_1@10.1.2.30:ns_config_events:ns_config_log:handle_event:60] config change:
counters ->
[

{rebalance_fail,2}

,

{rebalance_start,11}

,

{rebalance_success,9}

]
[ns_server:info] [2012-02-07 2:01:50] [ns_1@10.1.2.30:ns_config_events:ns_node_disco_conf_events:handle_event:56] ns_node_disco_conf_events config all
[ns_server:info] [2012-02-07 2:01:50] [ns_1@10.1.2.30:ns_config_rep:ns_config_rep:handle_info:181] Pushing config
[ns_server:info] [2012-02-07 2:01:50] [ns_1@10.1.2.30:ns_config_rep:ns_config_rep:handle_info:183] Pushing config done
[ns_server:info] [2012-02-07 2:01:50] [ns_1@10.1.2.30:ns_config_events:ns_config_log:handle_event:60] config change:
rebalance_status ->

{none,<<"Rebalance failed. See logs for detailed reason. You can try rebalance again.">>}