elasticsearch - 使用节点客户端在索引数据中获取异常

Question

我使用过运输客户端，在此之前效果很好。我现在想使用节点客户端。我尝试了以下方法:

package es.code;

import org.apache.log4j.Logger;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.client.Client;
import org.elasticsearch.node.Node;

import static org.elasticsearch.node.NodeBuilder.*;

import java.io.IOException;

public class elasticsearch {

    private elasticsearch() {
    }

    public static void main(String[] args) throws IOException {
        System.out.println("Hello, World");
        Client client = null;

        Node node = nodeBuilder().clusterName("sample_test").client(true).node();
        client = node.client();
        String json = "{" +
                "\"user\":\"prachi\"," +
                "\"postDate\":\"2013-01-30\"," +
                "\"message\":\"trying out Elasticsearch\"" +
                "}";

        IndexResponse response = client.prepareIndex("estest", "testing")
                .setSource(json)
                .execute()
                .actionGet();

        System.out.println(response.getId());    
        node.close();  
    }

}

我收到以下异常:

Exception in thread "main" org.elasticsearch.discovery.MasterNotDiscoveredException: waited for [1m]
    at org.elasticsearch.action.support.master.TransportMasterNodeOperationAction$4.onTimeout(TransportMasterNodeOperationAction.java:164)
    at org.elasticsearch.cluster.ClusterStateObserver$ObserverClusterStateListener.onTimeout(ClusterStateObserver.java:239)
    at org.elasticsearch.cluster.service.InternalClusterService$NotifyTimeout.run(InternalClusterService.java:520)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:744)

我做错了什么？如果删除client(true)，程序将成功运行。但是我没有在ES索引中看到数据。

正确的方法是什么？

Answer 1

我刚刚玩过您的代码，它运行得很好，要使此代码正常工作，您必须在群集上运行主节点(名称为sample_test)。当您拥有client(true)时，ES将创建一个传输客户端实例，该实例将远程连接到正在运行的集群(不加入集群)。

当客户端为true时，从节点客户端文档中获取

Is the node going to be a client node which means it will hold no data (node.data is set to false) and other optimizations by different modules.

//Master node should be running. Works as a client. 
nodeBuilder().clusterName("sample_test").client(true).node() 

//Spin up individual node instance. 
nodeBuilder().clusterName("sample_test").node() 

如果您还需要为节点客户端配置数据存储，则以下代码可能会为您提供帮助。

Settings settings = ImmutableSettings.settingsBuilder().put("path.data", "D:\\ESDATA\\").build();
nodeBuilder().settings(settings);
Node node = nodeBuilder().clusterName("sample_test").data(true).settings(settings).node();