ES 5.1 java client fails to connect to single node cluster in localhost

elasticsearch.yml

# ======================== Elasticsearch Configuration =========================
#
# NOTE: Elasticsearch comes with reasonable defaults for most settings.
#       Before you set out to tweak and tune the configuration, make sure you
#       understand what are you trying to accomplish and the consequences.
#
# The primary way of configuring a node is via this file. This template lists
# the most important settings you may want to configure for a production cluster.
#
# Please see the documentation for further information on configuration options:
# <https://www.elastic.co/guide/en/elasticsearch/reference/5.0/settings.html>
#
# ---------------------------------- Cluster -----------------------------------
#
# Use a descriptive name for your cluster:
#
cluster.name: counselytics
#
# ------------------------------------ Node ------------------------------------
#
# Use a descriptive name for the node:
#
#node.name: node-1
#
# Add custom attributes to the node:
#
#node.attr.rack: r1
#
# ----------------------------------- Paths ------------------------------------
#
# Path to directory where to store the data (separate multiple locations by comma):
#
#path.data: /path/to/data
#
# Path to log files:
#
#path.logs: /path/to/logs
#
# ----------------------------------- Memory -----------------------------------
#
# Lock the memory on startup:
#
#bootstrap.memory_lock: true
#
# Make sure that the heap size is set to about half the memory available
# on the system and that the owner of the process is allowed to use this
# limit.
#
# Elasticsearch performs poorly when the system is swapping the memory.
#
# ---------------------------------- Network -----------------------------------
#
# Set the bind address to a specific IP (IPv4 or IPv6):
#
#network.host: 192.168.0.1
network.host: 10.0.1.2
#
# Set a custom port for HTTP:
#
#http.port: 9200
#
# For more information, see the documentation at:
# <https://www.elastic.co/guide/en/elasticsearch/reference/5.0/modules-network.html>
#
# --------------------------------- Discovery ----------------------------------
#
# Pass an initial list of hosts to perform discovery when new node is started:
# The default list of hosts is ["127.0.0.1", "[::1]"]
#
#discovery.zen.ping.unicast.hosts: ["host1", "host2"]
#
# Prevent the "split brain" by configuring the majority of nodes (total number of nodes / 2 + 1):
#
#discovery.zen.minimum_master_nodes: 3
#
# For more information, see the documentation at:
# <https://www.elastic.co/guide/en/elasticsearch/reference/5.0/modules-discovery-zen.html>
#
# ---------------------------------- Gateway -----------------------------------
#
# Block initial recovery after a full cluster restart until N nodes are started:
#
#gateway.recover_after_nodes: 3
#
# For more information, see the documentation at:
# <https://www.elastic.co/guide/en/elasticsearch/reference/5.0/modules-gateway.html>
#
# ---------------------------------- Various -----------------------------------
#
# Require explicit names when deleting indices:
#
#action.destructive_requires_name: true

test.log

f@Omoikane:~/Workshop/elasticsearch/elasticsearch-5.0.2$ curl http://10.0.1.2:9200/_cluster/health?pretty=true
{
  "cluster_name" : "counselytics",
  "status" : "green",
  "timed_out" : false,
  "number_of_nodes" : 1,
  "number_of_data_nodes" : 1,
  "active_primary_shards" : 0,
  "active_shards" : 0,
  "relocating_shards" : 0,
  "initializing_shards" : 0,
  "unassigned_shards" : 0,
  "delayed_unassigned_shards" : 0,
  "number_of_pending_tasks" : 0,
  "number_of_in_flight_fetch" : 0,
  "task_max_waiting_in_queue_millis" : 0,
  "active_shards_percent_as_number" : 100.0
}

test.scala

/**
  * Created by f on 10/25/16.
  */


import java.nio.file._

import java.net.InetAddress

import org.elasticsearch.action.admin.cluster.state.ClusterStateRequestBuilder
import org.elasticsearch.client.ElasticsearchClient
import org.elasticsearch.client.transport.TransportClient
import org.elasticsearch.index.query.{QueryBuilder, QueryBuilders}
import org.elasticsearch.common.settings.Settings
import org.elasticsearch.common.transport.InetSocketTransportAddress
import org.elasticsearch.transport.client.PreBuiltTransportClient

//val host = "127.0.0.1"
val host = "10.0.1.2"
val port = 9300
val clusterName = "counselytics"

val ineta = InetAddress.getByName(host)
val insta = new InetSocketTransportAddress(ineta, port)

//initialize client
val settings = 
  Settings.builder()
    .put("cluster.name", clusterName)
    .put("client.transport.ping_timeout", "5s")
    .put("client.transport.sniff", false)
    .put("client.transport.ignore_cluster_name", true)
    .build()

val client  = new PreBuiltTransportClient(settings).addTransportAddress(insta)

val q = client.prepareSearch().setQuery(QueryBuilders.termQuery("hashtags", "fede"))
val r = q.execute().actionGet()

test.scala.out

scala> :load services/transition-queues/src/test/scripts/config.scala
Loading services/transition-queues/src/test/scripts/config.scala...
import java.nio.file._
import com.csl.common.util.OptionSyntax._
import com.csl.transitions._
import com.typesafe.config._
import java.net.InetAddress
import org.elasticsearch.action.admin.cluster.state.ClusterStateRequestBuilder
import org.elasticsearch.client.ElasticsearchClient
import org.elasticsearch.client.transport.TransportClient
import org.elasticsearch.index.query.{QueryBuilder, QueryBuilders}
import org.elasticsearch.common.settings.Settings
import org.elasticsearch.common.transport.InetSocketTransportAddress
import org.elasticsearch.transport.client.PreBuiltTransportClient
host: String = 10.0.1.2
port: Int = 9300
clusterName: String = counselytics
ineta: java.net.InetAddress = /10.0.1.2
insta: org.elasticsearch.common.transport.InetSocketTransportAddress = 10.0.1.2:9300
settings: org.elasticsearch.common.settings.Settings = org.elasticsearch.common.settings.Settings@45d00dd8
client: org.elasticsearch.client.transport.TransportClient = org.elasticsearch.transport.client.PreBuiltTransportClient@1ac3526f
q: org.elasticsearch.action.search.SearchRequestBuilder =
{
  "query" : {
    "term" : {
      "hashtags" : {
        "value" : "fede",
        "boost" : 1.0
      }
    }
  },
  "ext" : { }
}
org.elasticsearch.client.transport.NoNodeAvailableException: None of the configured nodes are available: [{#transport#-1}{CNMkfq--T8mzs0iBNN8SDg}{10.0.1.2}{10.0.1.2:9300}]
  at org.elasticsearch.client.transport.TransportClientNodesService.ensureNodesAreAvailable(TransportClientNodesService.java:328)
  at org.elasticsearch.client.transport.TransportClientNodesService.execute(TransportClientNodesService.java:226)
  at org.elasticsearch.client.transport.TransportProxyClient.execute(TransportProxyClient.java:59)
  at org.elasticsearch.client.transport.TransportClient.doExecute(TransportClient.java:345)
  at org.elasticsearch.client.support.AbstractClient.execute(AbstractClient.java:403)
  at org.elasticsearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:80)
  at org.elasticsearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:54)
  ... 65 elided