None of the configured nodes are available

1. 今天写了一段ES的测试代码，如下：

package elasticSearch;

import java.net.InetSocketAddress;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.elasticsearch.action.index.IndexRequestBuilder;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.Client;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.InetSocketTransportAddress;
import org.elasticsearch.index.query.QueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;

import entity.Person;
import util.JsonUtils;

public class ESTest {

	private Client client;

	public ESTest() {
		this("localhost");
	}

	public ESTest(String ip) {
		Settings settings = Settings.settingsBuilder().put("cluster.name", "huiTest")
				.build();
		client = TransportClient.builder().settings(settings).build();
		client = ((TransportClient) client).addTransportAddress(
				new InetSocketTransportAddress(new InetSocketAddress(ip, 9300)));

	}

	public IndexResponse createIndex(String indexName, String type,
			List<String> jsonArray) {

		IndexRequestBuilder builder = client.prepareIndex(indexName, type);
		for (String jsonTemp : jsonArray) {
			System.out.println(jsonTemp);
			builder = builder.setSource(jsonTemp);
		}
		IndexResponse response = builder.execute().actionGet();
		return response;

	}

	public List<Person> search(QueryBuilder queryBuilder, String indexName, String type) {
		List<Person> persons = new ArrayList<>();

		SearchResponse sResponse = client.prepareSearch(indexName).setTypes(type)
				.setQuery(queryBuilder).execute().actionGet();
		SearchHits hits = sResponse.getHits();

		System.out.println(hits.getTotalHits());
		Double salary = 0.0;
		SearchHit[] hitArray = hits.hits();
		for (SearchHit hit : hitArray) {
			Map<String, Object> map = hit.getSource();

			Integer age = (Integer) map.get("age");
			String name = (String) map.get("name");
			Object salaryO = map.get("salary");
			if (salaryO instanceof Integer) {
				salary = (Integer) salaryO * 1.0;
			} else {
				salary = (Double) salaryO;
			}
			Person p = new Person(name, age, salary);

			persons.add(p);
		}
		return persons;
	}

	public static void main(String[] args) {
		ESTest esTest = new ESTest();

		List<Person> persons = JsonUtils.getData(10);
		List<String> jsonArray = JsonUtils.covertList2String(persons);

		String indexName = "liuhui'sindex";// 要小写
		String type = "liuhui'sType";
		 esTest.createIndex(indexName, type, jsonArray);

		// QueryBuilder builder = QueryBuilders.matchAllQuery();
		// QueryBuilder builder = QueryBuilders.termQuery("name", "hui10");
		QueryBuilder builder = QueryBuilders.termQuery("age", "20");

		List<Person> list = esTest.search(builder, indexName, type);
		System.out.println(list);

	}

}

运行时报错如下：

Exception in thread "main" NoNodeAvailableException[None of the configured nodes are available: [{#transport#-1}{127.0.0.1}{localhost/127.0.0.1:9300}]]
     at org.elasticsearch.client.transport.TransportClientNodesService.ensureNodesAreAvailable(TransportClientNodesService.java:290)
     at org.elasticsearch.client.transport.TransportClientNodesService.execute(TransportClientNodesService.java:207)
     at org.elasticsearch.client.transport.support.TransportProxyClient.execute(TransportProxyClient.java:55)
     at org.elasticsearch.client.transport.TransportClient.doExecute(TransportClient.java:288)
     at org.elasticsearch.client.support.AbstractClient.execute(AbstractClient.java:359)
     at org.elasticsearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:86)
     at org.elasticsearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:56)
     at elasticSearch.ESTest.search( ESTest.java:60)
     at elasticSearch.ESTest.main( ESTest.java:99)

造成这一异常的原因，仅我所知的，有以下几个：

1. 运行该客户端时 elasticsearch.bat未启动；

2. cluster.name:huiTest未在ES的安装目录config下的elasticsearch.yml中配置，即如果代码里使用了put("cluster.name","huiTest")，则一定要在elasticsearch.yml中添加一行配置：cluster.name:huiTest，因为cluster.name默认是elasticsearch。当然也可以不使用put("cluster.name","huiTest")，或者使用put("cluster.name","elasticsearch");这里要注意如果修改了elasticsearch.yml文件，一定要重启elasticsearch.bat；

3. 客户端端口不是用的9300，而是9200.9200是为http协议准备的，9300才是客户端使用的；

   以上3条逐个排查，多半问题就解决了；