Java连接elasticsearch集群 NoNodeAvailableException 解决方法

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以下是java连接elasticsearch集群，新增一个index的客户端代码

package com.yyfq.report.test;import java.net.InetAddress;import java.net.UnknownHostException;import java.util.HashMap;import java.util.Map;import org.elasticsearch.action.index.IndexResponse;  import org.elasticsearch.client.Client;  import org.elasticsearch.client.transport.TransportClient;  import org.elasticsearch.common.settings.Settings;  import org.elasticsearch.common.transport.InetSocketTransportAddress;  public class ElasticsearchTest {      public static void main(String[] argv) throws UnknownHostException{

//客户端连接elasticsearch代码    Map<String, String> map = new HashMap();      map.put("cluster.name", "elasticsearch");      Settings.Builder settings = Settings.builder().put(map).put("client.transport.ignore_cluster_name", true);      Client client = TransportClient.builder().settings(settings).build()                      .addTransportAddress(new InetSocketTransportAddress(                              InetAddress.getByName("127.0.0.1"), Integer.parseInt("9200")));

// 新增一个index        IndexResponse response = client.prepareIndex("twitter", "tweet")                  .setId("1")                  .setSource("{'counter':'2','tags':'Add one more!''}")                  .execute()                  .actionGet();          System.out.println("response.version():"+response.getVersion());        //关闭客户端        client.close();      }  }

执行以上代码时会抛出一个错误：Exception in thread "main" NoNodeAvailableException[None of the configured nodes are available......

解决方法：

1. 端口号不能与HTTP设置的端口号一致！！！！

2. 集权名称如果与elasticsearch.yml 中定义的一致，或者默认的elasticsearh, setting必须为Setting.Empty

下面是改正过的连接方案。

public class ElasticsearchTest {      public static void main(String[] argv) throws NumberFormatException, UnknownHostException{         /* //设置新集群名称        Settings settings = Settings.builder()        .put("cluster.name", "newCluster")        .put("node.name","newNode").build();*/        //创建client        TransportClient client = new PreBuiltTransportClient(Settings.EMPTY)                .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("127.0.0.1"), 9300));        //搜索数据        GetResponse response = client.prepareGet("twitter", "tweet", "1").execute().actionGet();        //输出结果        System.out.println(response.getSourceAsString());                                     //关闭client                client.close();     }     }

3. 如果不是端口号和集群名称的问题，请检查你的jar包版本是否对应elasticsearch版本

我用的elasticsearch 5.1.1, 对应的Maven jar包依赖

希望这篇文章能帮到你！

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