"listFields" always be empty under FULL_AUTO mode?

[ShaoFeng Shi]

Hello Helix developers,

I'm trying to use Helix (0.7.1) to manage some resources; every 5 minutes,
such a resource will be added to the cluster; Each resource only has 1
partition, and it's state model is "LEADER_STANDBY" (the leader will do
some exclusive job); the rebalance mode is FULL_AUTO. Now the cluster has
two instances.  The interesting thing I found is, all the LEADERs are
assigned to the first node of my cluster, and the other cluster carries all
STANDBYs. Although when I disable the first node, all the LEADERs are
transferred to the second node automatically, I expect there could be some
load balance among them: half leaders on the first node, the others on the
second. Did I do something wrong, or this is expected?

Another issue I faced is, on the helix-ui, it can show all resources, but
when selecting a resource, the "partitions" tab couldn't show which
instances it be assigned to; the only message is "No partitions of
 <resource_name> are assigned!"

I checked the UI code, it indicates the reason is the "listFields" is
empty. That matches with what I see with the helix-admin.sh
--listResourceInfo:

IdealState for Resource_Stream_1454391900000_1454392200000:
{
  "id" : "Resource_Stream_1454391900000_1454392200000",
  "mapFields" : {
    "Resource_Stream_1454391900000_1454392200000" : {
    }
  },
  "listFields" : {
    "Resource_Stream_1454391900000_1454392200000" : [ ]
  },
  "simpleFields" : {
    "IDEAL_STATE_MODE" : "AUTO_REBALANCE",
    "NUM_PARTITIONS" : "1",
    "REBALANCE_MODE" : "FULL_AUTO",
    "REPLICAS" : "3",
    "STATE_MODEL_DEF_REF" : "LeaderStandby",
    "STATE_MODEL_FACTORY_NAME" : "DEFAULT"
  }
}

ExternalView for Resource_Stream_1454391900000_1454392200000:
{
  "id" : "Resource_Stream_1454391900000_1454392200000",
  "mapFields" : {
    "Resource_Stream_1454391900000_1454392200000" : {
      "kylin-dev3_8080" : "LEADER",
      "kylin-dev4_8080" : "STANDBY"
    }
  },
  "listFields" : {
  },
  "simpleFields" : {
    "BUCKET_SIZE" : "0"
  }
}

I checked the code, it seems for FULL_AUTO, the values for "listFields" and
"mapFields" are empty (at least at the begining). Will it be updated at
some point of time, or how could I trigger that?

Thanks in advance for your help; I'm new to Helix so may not get some
concepts correctly. Just correct me if I'm wrong, thanks!

-- 
Best regards,

Shaofeng Shi