java - 无可用节点异常 Elasticsearch 5.0.2

Question

首先，我对我的英语感到抱歉。 我的 Java API 传输客户端有问题。我有一个主节点和三个数据节点。我的 Elasticsearch 版本是 5.0.2，我使用 5.0.2 API。

我尝试使用 Transport Client 连接到我的集群，然后我做出响应

Exception in thread "main" NoNodeAvailableException[None of the configured nodes are available: [{#transport#-1}{8SAZOxXXTU61DuDDMN-vGw}{XX.XX.X.XXX}{XX.XX.X.XXX:9300}, {#transport#-2}{Fv3729YgTGClRBo5T2mWpA}{XX.XX.X.XXX}{XX.XX.X.XXX:9300}, {#transport#-3}{Fr98ApBbRv29Xv6Mc8L4TQ}{XX.XX.X.XXX}{XX.XX.X.XXX:9300}, {#transport#-4}{JOmpSH4LRzuP_XInxQtD9Q}{XX.XX.X.XXX}{XX.XX.X.XXX: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:339)
    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)
    at org.elasticsearch.action.ActionRequestBuilder.get(ActionRequestBuilder.java:62)
    at nn.Main.main(Main.java:57)

这是我的客户端代码:

import java.net.InetAddress;
import java.net.UnknownHostException;

import org.elasticsearch.action.search.SearchRequestBuilder;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.action.search.SearchType;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.InetSocketTransportAddress;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.xpack.client.PreBuiltXPackTransportClient;

public class Main {
    private static String[] hosts = new String[] {
            "XX.XX.X.XXX"
            ,"XX.XX.X.XXX"
            ,"XX.XX.X.XXX"
            ,"XX.XX.X.XXX"          
            };

    private static final Settings settings = Settings.builder()
            .put("cluster.name", "myCluster")
            .put("client.transport.sniff", true)
            .put("transport.tcp.port", 9300)
            .put("xpack.security.user", "transport_client_user:changeme")
            .build();
    private static final String index = "myIndex";
    private static final String type = "myType";
    private static TransportClient client;


    public static void main(String[] args) throws UnknownHostException {

        InetSocketTransportAddress[] ista = new InetSocketTransportAddress[hosts.length]; 

        for (int i = 0; i < hosts.length; i++) {
        ista[i] = new InetSocketTransportAddress(InetAddress.getByName(hosts[i]), 9300);
    }

        client = new PreBuiltXPackTransportClient(settings).addTransportAddresses(ista);        

        SearchRequestBuilder rb = client
                .prepareSearch(index)
                .setTypes(type)
                .setSearchType(SearchType.DEFAULT)
                .setQuery(QueryBuilders.termQuery("_id", 3524598));


        SearchResponse sResponse = rb.get();
        System.out.println(sResponse.toString());
    }
}

传输客户端端口 - 9300，我的所有节点都在此端口下进行通信。我看到了很多像我的问题，我试图遵循其中包含的建议。但我也有同样的异常(exception)。

如果需要更多信息或我的 Elastic 的任何文件或设置 - 我已准备好回答。

如果很重要，这是elasticsearch.yml的内容

cluster.name: myCluster
node.name: elastic-0

path.data: /var/db/elasticsearch
path.logs: /var/log/elasticsearch
path.scripts: /usr/local/libexec/elasticsearch

network.host: _vmx0_

node.master: true 
node.data: false 
node.ingest: false 

node.attr.rack_id: rack_one
cluster.routing.allocation.awareness.attributes: rack_id

discovery.zen.minimum_master_nodes: 3
discovery.zen.ping.unicast.hosts: ["XX.XX.X.XXX","XX.XX.X.XXX","XX.XX.X.XXX","XX.XX.X.XXX","XX.XX.X.XXX"]

bootstrap.memory_lock: false

xpack.monitoring.exporters:
  id1:
    type: http
    host: ["XX.XX.X.XXX:9200"] 
    auth.username: remote_monitor 
    auth.password: changeme

我尝试仅在 Client 上更改 TransportClient，并禁用 client.transport.sniff 但没有结果。

如果您有任何帮助或想法，我将非常感激。

Answer 1

我找到了收到“NoNodeAvailableException”的原因。

原因是transport_client角色默认没有授予查看所有索引中数据的权限。 我将建立我的角色来访问索引中的数据。

链接:https://www.elastic.co/guide/en/x-pack/5.0/built-in-roles.html