Unable to retrieve documents after node reboot

We are testing DP4 on a 3 node Couchbase cluster. After stopping and starting any number of nodes we are unable to retrieve a large number of documents on the database.

At that point we are able to see errors such as these in the logs:

Control connection to memcached on 'ns_1@172.x.x.x' disconnected: {{badmatch,
{error,
closed}},
[

{mc_client_binary, stats_recv, 4}

,

{mc_client_binary, stats, 4}

,

{ns_memcached, do_handle_call, 3}

,

{ns_memcached, handle_call, 3}

,

{gen_server, handle_msg, 5}

,

{proc_lib, init_p_do_apply, 3}

]} (repeated 6 times)