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 {

   1private Client client;
   2
   3public ESTest() {
   4	this("localhost");
   5}
   6
   7public ESTest(String ip) {
   8	Settings settings = Settings.settingsBuilder().put("cluster.name", "huiTest")
   9			.build();
   10	client = TransportClient.builder().settings(settings).build();
   11	client = ((TransportClient) client).addTransportAddress(
   12			new InetSocketTransportAddress(new InetSocketAddress(ip, 9300)));
   13
   14}
   15
   16public IndexResponse createIndex(String indexName, String type,
   17		List<String> jsonArray) {
   18
   19	IndexRequestBuilder builder = client.prepareIndex(indexName, type);
   20	for (String jsonTemp : jsonArray) {
   21		System.out.println(jsonTemp);
   22		builder = builder.setSource(jsonTemp);
   23	}
   24	IndexResponse response = builder.execute().actionGet();
   25	return response;
   26
   27}
   28
   29public List<Person> search(QueryBuilder queryBuilder, String indexName, String type) {
   30	List<Person> persons = new ArrayList<>();
   31
   32	SearchResponse sResponse = client.prepareSearch(indexName).setTypes(type)
   33			.setQuery(queryBuilder).execute().actionGet();
   34	SearchHits hits = sResponse.getHits();
   35
   36	System.out.println(hits.getTotalHits());
   37	Double salary = 0.0;
   38	SearchHit[] hitArray = hits.hits();
   39	for (SearchHit hit : hitArray) {
   40		Map<String, Object> map = hit.getSource();
   41
   42		Integer age = (Integer) map.get("age");
   43		String name = (String) map.get("name");
   44		Object salaryO = map.get("salary");
   45		if (salaryO instanceof Integer) {
   46			salary = (Integer) salaryO * 1.0;
   47		} else {
   48			salary = (Double) salaryO;
   49		}
   50		Person p = new Person(name, age, salary);
   51
   52		persons.add(p);
   53	}
   54	return persons;
   55}
   56
   57public static void main(String[] args) {
   58	ESTest esTest = new ESTest();
   59
   60	List<Person> persons = JsonUtils.getData(10);
   61	List<String> jsonArray = JsonUtils.covertList2String(persons);
   62
   63	String indexName = "liuhui'sindex";// 要小写
   64	String type = "liuhui'sType";
   65	 esTest.createIndex(indexName, type, jsonArray);
   66
   67	// QueryBuilder builder = QueryBuilders.matchAllQuery();
   68	// QueryBuilder builder = QueryBuilders.termQuery("name", "hui10");
   69	QueryBuilder builder = QueryBuilders.termQuery("age", "20");
   70
   71	List<Person> list = esTest.search(builder, indexName, type);
   72	System.out.println(list);
   73
   74}
   

   }

运行时报错如下：

1Exception in thread "main" NoNodeAvailableException[None of the configured nodes are available: [{#transport#-1}{127.0.0.1}{localhost/127.0.0.1:9300}]]
2     at org.elasticsearch.client.transport.TransportClientNodesService.ensureNodesAreAvailable(TransportClientNodesService.java:290)
3     at org.elasticsearch.client.transport.TransportClientNodesService.execute(TransportClientNodesService.java:207)
4     at org.elasticsearch.client.transport.support.TransportProxyClient.execute(TransportProxyClient.java:55)
5     at org.elasticsearch.client.transport.TransportClient.doExecute(TransportClient.java:288)
6     at org.elasticsearch.client.support.AbstractClient.execute(AbstractClient.java:359)
7     at org.elasticsearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:86)
8     at org.elasticsearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:56)
9     at elasticSearch.ESTest.search( ESTest.java:60)
10     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；