xdcr replication broken

1) Created 5k docs in the primary site
2) Start xdcr replication to destination

• no documents transferred to destination
• and I see errors like this in the UI:

[XMem Srv] Error replicating vbucket 0: function_clause

in xdcr_error logs i see:

xdcr:error,2014-01-16T10:43:41.734,ns_1@172.23.106.53:<0.9627.18>:xdc_vbucket_rep_xmem_srv:terminate:277][xmem_srv for vb 0]: shutdown xmem server, error reported to parent <0.9610.18>
[xdcr:error,2014-01-16T10:43:41.891,ns_1@172.23.106.53:<0.9647.18>:xdc_vbucket_rep_xmem_worker:terminate:523][xmem_worker 1 for vb 0]: shutdown xmem worker, error reported to parent xmem srv: <0.9646.18>
[xdcr:error,2014-01-16T10:43:41.892,ns_1@172.23.106.53:<0.9646.18>:xdc_vbucket_rep_xmem_srv:terminate:277][xmem_srv for vb 0]: shutdown xmem server, error reported to parent <0.9635.18>
[xdcr:error,2014-01-16T10:43:41.892,ns_1@172.23.106.53:<0.9635.18>:xdc_vbucket_rep:terminate:404]Replication (XMem mode) `12c4ab408e44f751e511e6b43bd6142d/default/default` (`default/0` -> `http://*****@172.23.106.55:8092/default%2f0%3bc91f1fb2c4055c415062b4c3c2d556f8`) failed.Please see ns_server debug log for complete state dump
[xdcr:error,2014-01-16T10:43:42.044,ns_1@172.23.106.53:<0.9666.18>:xdc_vbucket_rep_xmem_worker:terminate:523][xmem_worker 1 for vb 0]: shutdown xmem worker, error reported to parent xmem srv: <0.9665.18>
[xdcr:error,2014-01-16T10:43:42.044,ns_1@172.23.106.53:<0.9654.18>:xdc_vbucket_rep:terminate:404]Replication (XMem mode) `12c4ab408e44f751e511e6b43bd6142d/default/default` (`default/0` -> `http://*****@172.23.106.55:8092/default%2f0%3bc91f1fb2c4055c415062b4c3c2d556f8`) failed.Please see ns_server debug log for complete state dump
[xdcr:error,2014-01-16T10:43:42.044,ns_1@172.23.106.53:<0.9665.18>:xdc_vbucket_rep_xmem_srv:terminate:277][xmem_srv for vb 0]: shutdown xmem server, error reported to parent <0.9654.18>

and from errors log there is this CRASH REPORT:

[error_logger:error,2014-01-16T10:43:08.491,ns_1@172.23.106.53:error_logger<0.6.0>:ale_error_logger_handler:log_report:72]
=========================CRASH REPORT=========================
crasher:
initial call: xdc_vbucket_rep_xmem_worker:init/1
pid: <0.6951.18>
registered_name: []
exception exit: function_clause
in function gen_server:terminate/6
ancestors: [<0.6950.18>,<0.6939.18>,<0.30447.16>,<0.30442.16>,
xdc_replication_sup,ns_server_sup,ns_server_cluster_sup,
<0.58.0>]
messages: [{'$gen_call',

{<0.6954.18>,#Ref<0.0.20.162876>}

,
{flush_docs_pipeline,
[{doc,<<"6e79ed05baec2754">>,

{1, <<0,11,68,101,64,199,144,51,0,0,0,0,0,0,0,0,1, 0>>}

,
<<"

{\"key\":\"6e79ed05baec2754\",\n \"key_num\":1810,\n \"name\":\"6e79 275\",\n \"email\":\"6e79@9e.com\",\n \"city\":\"ed0\",\n \"country\":\"5b\",\n \"realm\":\"ae\",\n \"coins\":282.81,\n \"category\":2,\n \"achievements\":[11, 99, 189, 76, 146, 206],\"body\":\"xc4ca4238a0b923820dcc509a6f75849b\"}

">>,
0,false,[]}]}},

cbcollect: http://10.1.1.210:7878/cherimoya-s21601.zip