Java 无法连接到Elasticsearch 6.1.0[配置的节点均不可用]

我能够通过cURL和plugin head连接到弹性搜索

6.1.0

，并对文档进行索引、更新、删除和查询，但我无法通过java客户端连接到弹性搜索

6.1.0

，即

    /**
     * Elasticsearch
     */
    // https://mvnrepository.com/artifact/org.elasticsearch/elasticsearch
    compile group: 'org.elasticsearch', name: 'elasticsearch', version: '6.1.0'
    // https://mvnrepository.com/artifact/org.elasticsearch.client/transport
    compile group: 'org.elasticsearch.client', name: 'transport', version: '6.1.0'

依赖关系。 下面是elasticsearch.yml

#cluster.name: my-application
cluster.name: saasworthy-qa

node.name: qa-1

path.data: /var/lib/elasticsearch

path.logs: /var/log/elasticsearch

#network.host: 192.168.0.1
network.host: 10.10.10.2

#http.port: 9200

#discovery.zen.ping.unicast.hosts: ["host1", "host2"]
#discovery.zen.ping.unicast.hosts: ["10.10.10.2"]
#discovery.zen.minimum_master_nodes: 1

通过java客户端接收到的错误为：

ERROR StatusLogger Log4j2 could not find a logging implementation. Please add log4j-core to the classpath. Using SimpleLogger to log to the console...
Exception in thread "main" NoNodeAvailableException[None of the configured nodes are available: [{#transport#-1}{SLvQfw9FREWVhpwTBtjNWg}{X.X.X.X}{X.X.X.X:9300}]]
    at org.elasticsearch.client.transport.TransportClientNodesService.ensureNodesAreAvailable(TransportClientNodesService.java:347)
    at org.elasticsearch.client.transport.TransportClientNodesService.execute(TransportClientNodesService.java:245)
    at org.elasticsearch.client.transport.TransportProxyClient.execute(TransportProxyClient.java:60)
    at org.elasticsearch.client.transport.TransportClient.doExecute(TransportClient.java:360)
    at org.elasticsearch.client.support.AbstractClient.execute(AbstractClient.java:405)
    at org.elasticsearch.client.support.AbstractClient.execute(AbstractClient.java:394)
    at org.elasticsearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:46)
    at com.sw.config.elastic.connection.factory.SaaSWorthyElasticsearchClientFactory.main

另外，
netstat
info

netstat -antp | grep 9300
tcp6       0      0 10.10.10.2:9300         :::*                    LISTEN      19768/java 

请帮我解决这个问题。谢谢。
For Java Elasticsearch提供了两套客户端API：



用于Java传输客户端的elasticsearch.yml（单节点）：

Java传输客户端示例：

    // on startup

    TransportClient client = new PreBuiltTransportClient(Settings.EMPTY)
            .addTransportAddress(new TransportAddress(InetAddress.getByName("localhost"), 9300));

    System.out.println(client.listedNodes());

    // on shutdown

    client.close();

要使用Java传输客户端，我们需要做，这对于初学者来说非常困难。使用Java REST客户端更容易

注意：Elasticsearch计划在Elasticsearch 7.0中弃用TransportClient，并在8.0中完全移除它。更多信息
可以找到（只需向下滚动搜索
警告（符号）

将
client.transport.sniff
标记为
false
后，我可以通过传输客户端进行连接。作为dev环境的服务器，集群只包含一个节点

更多

    // on startup

    TransportClient client = new PreBuiltTransportClient(Settings.EMPTY)
            .addTransportAddress(new TransportAddress(InetAddress.getByName("localhost"), 9300));

    System.out.println(client.listedNodes());

    // on shutdown

    client.close();