ep-engine crash in ep_engine.cc:2536 during replication in 1.7.0 GA build

attached the diags and logs

INFO REPORT <5845.452.0> 2011-06-17 16:52:10
===============================================================================

ns_log: logging ns_port_server:0:Port server memcached on node 'ns_1@10.32.62.220' exited with status 134. Restarting. Messages: Vbucket <1013> is going dead.
Vbucket <1022> is going dead.
memcached: ep_engine.cc:2356: bool EventuallyPersistentEngine::createTapQueue(const void*, std::string&, uint32_t, const void*, size_t): Assertion `nuserdata >= ((sizeof(uint16_t) + sizeof(uint64_t)) * nCheckpoints)' failed.

ERROR REPORT <5845.452.0> 2011-06-17 16:52:10
===============================================================================

• • Generic server <5845.452.0> terminating
  • Last message in was {#Port<5845.2299>,
    Unknown macro: {exit_status,134}

    }

  • When Server state ==
    Unknown macro: {state,#Port<5845.2299>,memcached, {["memcached: ep_engine.cc:2356: bool EventuallyPersistentEngine::createTapQueue(const void*, std::string&, uint32_t, const void*, size_t): Assertion `nuserdata >= ((sizeof(uint16_t) + sizeof(uint64_t)) * nCheckpoints)' failed.", "Vbucket <1022> is going dead."], ["Vbucket <1013> is going dead."]}, undefined,[],0,true}
  • Reason for termination ==
  • {abnormal,134}
    
    CRASH REPORT <5845.452.0> 2011-06-17 16:52:10
    ===============================================================================
    Crashing process
    initial_call {ns_port_server,init,['Argument__1']}
    pid <5845.452.0>
    registered_name []
    error_info
    {exit,{abnormal,134}

    ,
    [

    {gen_server,terminate,6}

    ,

    {proc_lib,init_p_do_apply,3}

    ]}
    ancestors
    [<5845.451.0>,ns_port_sup,ns_server_sup,ns_server_cluster_sup,
    <5845.50.0>]
    messages [

    {'EXIT',#Port<5845.2299>,normal}

    ]
    links [<5845.451.0>]
    dictionary []
    trap_exit true
    status running
    heap_size 17711
    stack_size 24
    reductions 362163867