error was encountered when requesting data from the server

Installed 1.6.0a-30. UI is still not ready for customers. Also in the middle of looking at the UI, the screen cleared, a loading message was displayed and then an error was displayed at the top:

NorthScale Message

An error was encountered when requesting data from the server. The console has been reloaded to attempt to recover. There may be additional information about the error in the log.

Log:

per_node_diag = [{'ns_1@127.0.0.1',
[{version,
[

{kernel,"2.13.4"},
{stdlib,"1.16.4"},
{os_mon,"2.2.4"},
{ns_server,"1.6.0a_92_ge7f48e5"},
{menelaus,"1.6.0a_92_ge7f48e5"},
{sasl,"2.1.8"}]},
{config,
{config,
{full,"/etc/opt/NorthScale/1.6.0a/config",undefined, ns_config_default},
[[{directory,"/etc/opt/NorthScale/1.6.0a"},
{isasl,
[{'_ver',{0,0,0}},
{path,"/etc/opt/NorthScale/1.6.0a/isasl.pw"}]}],
[{directory,"/opt/NorthScale/1.6.0a/config"},
{nodes_wanted,['ns_1@127.0.0.1']},
{rest,[{'_ver',{0,0,0}},{port,8080}]},
{rest_creds,[{'_ver',{0,0,0}},{creds,[]}]},
{isasl,[{'_ver',{0,0,0}},{path,"./priv/isasl.pw"}]},
{memcached,
[{'_ver',{0,0,0}},
{port,11210},
{ht_size,786433},
{dbname,"/opt/NorthScale/1.6.0a/data/ns_1/default"},
{admin_user,"_admin"},
{admin_pass,"_admin"},
{buckets,
[{"default",
[{num_vbuckets,16},
{num_replicas,0},
{map,undefined}]}]}]},
{moxi,[{'_ver',{0,0,0}},{port,11211}]},
{port_servers,
[{'_ver',{0,0,0}},
{moxi,"./bin/moxi/moxi",
["-Z",
{"port_listen=~B",[port]},
"-z",
"auth=,url=http://127.0.0.1:8080/pools/default/bucketsStreamingConfig/default,#@",
"-p","0"],
[{env,[]},use_stdio,stderr_to_stdout,stream]},
{memcached,"./bin/memcached/memcached",
["-p",
{"~B",[port]},
"-X","./bin/memcached/stdin_term_handler.so","-E",
"./bin/ep_engine/ep.so","-B","binary","-r","-e",
{"vb0=false;ht_size=~B;dbname=~s", [ht_size,dbname]}],
[{env,[{"MEMCACHED_TOP_KEYS","100"}]},
use_stdio,stderr_to_stdout,stream]}]},
{alerts,
[{'_ver',{0,0,0}},
{email,[]},
{email_alerts,false},
{email_server,
[{user,undefined},
{pass,'filtered-out'},
{addr,undefined},
{port,undefined},
{encrypt,false}]},
{alerts, [server_down,server_unresponsive,server_up, server_joined,server_left,bucket_created, bucket_deleted,bucket_auth_failed]}]}]],
[[{otp,
[{'_ver',{1276,538873,751165}},
{cookie,ocrouxifkpdgqmon}]},
{init_status,
[{'_ver',{1276,538947,691116}},{value,"done"}]},
{rest_creds,
[{'_ver',{1276,538947,690714}},
{creds,
[{"Administrator",[{password,'filtered-out'}]}]}]},
{port_servers,
[{'_ver',{0,0,0}},
{moxi,"./bin/moxi/moxi",
["-Z",
{"port_listen=~B",[port]},
"-z",
"auth=,url=http://127.0.0.1:8080/pools/default/bucketsStreamingConfig/default,#@",
"-p","0"],
[{env,[]},use_stdio,stderr_to_stdout,stream]},
{memcached,"./bin/memcached/memcached",
["-p",
{"~B",[port]},
"-X","./bin/memcached/stdin_term_handler.so","-E",
"./bin/ep_engine/ep.so","-B","binary","-r","-e",
{"vb0=false;ht_size=~B;dbname=~s", [ht_size,dbname]}],
[{env,[{"MEMCACHED_TOP_KEYS","100"}]},
use_stdio,stderr_to_stdout,stream]}]},
{alerts,
[{'_ver',{0,0,0}},
{email,[]},
{email_alerts,false},
{email_server,
[{user,undefined},
{pass,'filtered-out'},
{addr,undefined},
{port,undefined},
{encrypt,false}]},
{alerts, [server_down,server_unresponsive,server_up, server_joined,server_left,bucket_created, bucket_deleted,bucket_auth_failed]}]},
{nodes_wanted,['ns_1@127.0.0.1']},
{rest,[{'_ver',{1276,538947,690369}},{port,8080}]},
{memcached,
[{'_ver',{1276,538884,105469}},
{port,11210},
{ht_size,786433},
{dbname,"/opt/NorthScale/1.6.0a/data/ns_1/default"},
{admin_user,"_admin"},
{admin_pass,"_admin"},
{buckets,
[{"default",
[{num_vbuckets,16},
{num_replicas,0},
{map, [['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1']]}]}]}]},
{moxi,[{'_ver',{0,0,0}},{port,11211}]},
{{node,'ns_1@127.0.0.1',license},
[{'_ver',{1276,538911,39899}},
{license,"2372AA-F32F1G-M3SA01"}]},
{isasl,
[{'_ver',{0,0,0}},
{path,"/etc/opt/NorthScale/1.6.0a/isasl.pw"}]}]],
ns_config_default}},
{basic_info,
[{version,
[{kernel,"2.13.4"}

,

{stdlib,"1.16.4"}

,

{os_mon,"2.2.4"}

,

{ns_server,"1.6.0a_92_ge7f48e5"}

,

{menelaus,"1.6.0a_92_ge7f48e5"}

,

{sasl,"2.1.8"}

]},

{system_arch,"x86_64-unknown-linux-gnu"}

,

{wall_clock,135}

,
{memory_data,
{2058731520,1781329920,

{<0.61.0>,1113960}}}]},
{memory,{2058731520,1781329920,{<0.61.0>,1113960}

}},
{disk,
[

{"/",11204616,44}

,

{"/boot",101086,14}

,

{"/dev/shm",1005240,0}

]}]}]

nodes_info = [{struct,[

{clusterMembership,<<"inactiveAdded">>}

,

{status,<<"healthy">>}

,

{hostname,<<"127.0.0.1">>}

,

{version,<<"1.6.0a_92_ge7f48e5">>}

,

{os,<<"x86_64-unknown-linux-gnu">>}

,
{ports,{struct,[

{proxy,11211}

,

{direct,11210}

]}},

{otpNode,<<"ns_1@127.0.0.1">>}

,

{otpCookie,<<"ocrouxifkpdgqmon">>}

,

{uptime,<<"135">>}

,

{memoryTotal,2058731520}

,

{memoryFree,277401600}

,

{mcdMemoryReserved,0}

,

{mcdMemoryAllocated,0}

]}]

buckets = [{"default",
[

{num_vbuckets,16}

,

{num_replicas,0}

,

{map,[['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1'], ['ns_1@127.0.0.1']]}

]}]

logs:
-------------------------------
2010-06-14 11:07:53.922 ns_log:4:info:message - Log server started on node 'ns_1@127.0.0.1'

2010-06-14 11:08:04.119 ns_config_log:1:info:message - Config changed on node 'ns_1@127.0.0.1'
2010-06-14 11:08:23.038 menelaus_web:104:info:init status - initStatus updated to "welcome".
2010-06-14 11:08:31.051 menelaus_web:104:info:init status - initStatus updated to "resources".
2010-06-14 11:08:44.347 menelaus_web:104:info:init status - initStatus updated to "cluster".
2010-06-14 11:08:46.681 menelaus_web:104:info:init status - initStatus updated to "secure".
2010-06-14 11:09:07.691 menelaus_web:104:info:init status - initStatus updated to "done".