cluster version 1.7.0 crashed when add a 1.7.2 node in rolling upgrade

Create a cluster of 3 nodes membase server version 1.7.0
Load data to cluster.
Add a node with membase server version 1.7.2r-11 to cluster with version 1.7.0
The whole cluster of 3 nodes version 1.7.0 crashed.

• • gen_event handler ns_port_init crashed.
  • Was installed in ns_config_events
  • Last event was: {i_am_a_dead_man,true}
  • When handler state == {state}
  • Reason == {shutdown,
    Unknown macro: {gen_server,call, [ns_port_sup,which_children,infinity]}

    }

INFO REPORT <0.119.0> 2011-09-22 22:38:26
===============================================================================

Server error during processing: ["web request failed",

{path,"/pools/default"}

,

{type,error}

,

{what,badarg}

,
{trace,
[

{erlang,integer_to_list, ['_use_global_value']}

,

{menelaus_web,build_node_hostname,3}

,

{menelaus_web,build_node_info,4}

,

{menelaus_web, '-build_nodes_info_fun/3-fun-0-',9}

,

{menelaus_web, '-build_pool_info/4-lc$^0/1-0-',2},{menelaus_web, '-build_pool_info/4-lc$^0/1-0-',2}

,

{menelaus_web,build_pool_info,4}

,

{menelaus_web,handle_pool_info_wait,6}

]}]