Nodes go down all the time

Hi,
we have small 2 nodes cluster for development, and nodes in this cluster go down all the time.
They don't do it together, usually it's one of them.
It happens during re-balance and during regular operation.

Here is what we see in the log:
-----------------------------------------------------------------
Port server moxi on node 'babysitter_of_ns_1@127.0.0.1' exited with status 0. Restarting. Messages: 2014-02-17 08:31:00: (cproxy_config.c.315) env: MOXI_SASL_PLAIN_USR (13)
2014-02-17 08:31:00: (cproxy_config.c.324) env: MOXI_SASL_PLAIN_PWD (9)
WARNING: curl error: Recv failure: Connection was reset from: http://127.0.0.1:8091/pools/default/saslBucketsStreaming
WARNING: curl error: couldn't connect to host from: http://127.0.0.1:8091/pools/default/saslBucketsStreaming
ERROR: could not contact REST server(s): http://127.0.0.1:8091/pools/default/saslBucketsStreaming
WARNING: curl error: couldn't connect to host from: http://127.0.0.1:8091/pools/default/saslBucketsStreaming
ERROR: could not contact REST server(s): http://127.0.0.1:8091/pools/default/saslBucketsStreaming
WARNING: curl error: couldn't connect to host from: http://127.0.0.1:8091/pools/default/saslBucketsStreaming
ERROR: could not contact REST server(s): http://127.0.0.1:8091/pools/default/saslBucketsStreaming
WARNING: curl error: couldn't connect to host from: http://127.0.0.1:8091/pools/default/saslBucketsStreaming
ERROR: could not contact REST server(s): http://127.0.0.1:8091/pools/default/saslBucketsStreaming
WARNING: curl error: couldn't connect to host from: http://127.0.0.1:8091/pools/default/saslBucketsStreaming
ERROR: could not contact REST server(s): http://127.0.0.1:8091/pools/default/saslBucketsStreaming
WARNING: curl error: couldn't connect to host from: http://127.0.0.1:8091/pools/default/saslBucketsStreaming
ERROR: could not contact REST server(s): http://127.0.0.1:8091/pools/default/saslBucketsStreaming
WARNING: curl error: couldn't connect to host from: http://127.0.0.1:8091/pools/default/saslBucketsStreaming
ERROR: could not contact REST server(s): http://127.0.0.1:8091/pools/default/saslBucketsStreaming
WARNING: curl error: couldn't connect to host from: http://127.0.0.1:8091/pools/default/saslBucketsStreaming
ERROR: could not contact REST server(s): http://127.0.0.1:8091/pools/default/saslBucketsStreaming
WARNING: curl error: couldn't connect to host from: http://127.0.0.1:8091/pools/default/saslBucketsStreaming
ERROR: could not contact REST server(s): http://127.0.0.1:8091/pools/default/saslBucketsStreaming
WARNING: curl error: couldn't connect to host from: http://127.0.0.1:8091/pools/default/saslBucketsStreaming
ERROR: could not contact REST server(s): http://127.0.0.1:8091/pools/default/saslBucketsStreaming
WARNING: curl error: couldn't connect to host from: http://127.0.0.1:8091/pools/default/saslBucketsStreaming
ERROR: could not contact REST server(s): http://127.0.0.1:8091/pools/default/saslBucketsStreaming
WARNING: curl error: couldn't connect to host from: http://127.0.0.1:8091/pools/default/saslBucketsStreaming
ERROR: could not contact REST server(s): http://127.0.0.1:8091/pools/default/saslBucketsStreaming
WARNING: curl error: couldn't connect to host from: http://127.0.0.1:8091/pools/default/saslBucketsStreaming
ERROR: could not contact REST server(s): http://127.0.0.1:8091/pools/default/saslBucketsStreaming
WARNING: curl error: couldn't connect to host from: http://127.0.0.1:8091/pools/default/saslBucketsStreaming
ERROR: could not contact REST server(s): http://127.0.0.1:8091/pools/default/saslBucketsStreaming
EOL on stdin. Exiting

-------------------------------------------------

Port server ns_server on node 'babysitter_of_ns_1@127.0.0.1' exited with status 255. Restarting. Messages: kernel-poll not supported; "K" parameter ignored
Apache CouchDB 1.2.0a-a425d97-git (LogLevel=info) is starting.
Apache CouchDB has started. Time to relax.
working as port

Crash dump was written to: erl_crash.dump
eheap_alloc: Cannot allocate 153052320 bytes of memory (of type "heap").

This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.
in message_loop

------------------------------------------------------------------

Node 'ns_1@172.19.20.8' saw that node 'ns_1@172.19.20.3' went down. Details: [

{nodedown_reason, net_tick_timeout}

]

--------------------------------------------------------------------------

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

{path,"/pools/default/overviewStats"}

,

{type,exit}

,
{what,
{{nodedown,'ns_1@172.19.20.3'},
{gen_server,call,
[

{menelaus_stats_gatherer, 'ns_1@172.19.20.3'}

,
{gather_stats,
"classicguest-englishinternational",
['ns_1@172.19.20.3'],
undefined,
{1,hour,900}},
infinity]}}},
{trace,
[

{gen_server,call,3}

,

{menelaus_stats,grab_aggregate_op_stats,4}

,

{lists,map,2},{lists,map,2}

,

{menelaus_stats,handle_overview_stats,2}

,

{request_throttler,do_request,3}

,

{menelaus_web,loop,3}

,

{mochiweb_http,headers,5}

]}]