Elasticsearch TransportClient NetworkPlugin NoClassDefFoundError

Question

我期待将 Elasticsearch 集成到 Spring 引导 Web 应用程序中。这是我创建传输客户端的配置：

@Configuration
public class ElasticsearchConfig {

private TransportClient client;

@Bean
public TransportClient client() throws UnknownHostException{

    Settings settings = Settings.builder()
            .put("client.transport.nodes_sampler_interval", "5s")
            .put("client.transport.sniff", false)
            .put("transport.tcp.compress", true)
            .put("cluster.name", "clusterName")
            .put("xpack.security.transport.ssl.enabled", true)
            .build();

    client = new PreBuiltTransportClient(settings);

    client.addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("localhost"), 9300));

    return client;
}

当我启动项目时出现以下错误，我不知道为什么：

java.lang.ClassNotFoundException: org.elasticsearch.plugins.NetworkPlugin

我是不是忘记添加依赖项了？

<dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-elasticsearch</artifactId>
</dependency>
<dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>transport</artifactId>
    <version>5.1.1</version>
</dependency>

希望你能帮助我

Answer 1

对我来说，elastic search 在 pom 中似乎有错误的依赖版本

  <properties>
    <log4j.version>2.6.2</log4j.version>
</properties>

<dependencies>


  <dependency>
    <groupId>org.elasticsearch</groupId>
    <artifactId>elasticsearch</artifactId>
    <version>5.1.1</version>

  </dependency>

  <dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>transport</artifactId>
    <version>5.1.1</version>

    <exclusions>
      <exclusion>
        <artifactId>elasticsearch</artifactId>            
        <groupId>org.elasticsearch</groupId></exclusion>
    </exclusions>
  </dependency>      
   <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-api</artifactId>
        <version>${log4j.version}</version>
    </dependency>
    <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-core</artifactId>
        <version>${log4j.version}</version>
    </dependency>
    <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-web</artifactId>
        <version>${log4j.version}</version>
    </dependency>

尝试将版本替换为5.1.1 好吧，它看起来还需要 log4j ?!

此致，诺拉比斯

Answer 2

我刚遇到同样的问题。似乎 Elasticsearch 文档不完整。除了transport client依赖，还需要添加elasticsearch依赖：

<dependency>
    <groupId>org.elasticsearch</groupId>
    <artifactId>elasticsearch</artifactId>
    <version>5.1.1</version>
</dependency>

您还需要 log4j 依赖项，但这在 Elasticsearch docs.

中有明确说明

Answer 3

在ElasticsearchGithub页面this issue中有说明，SpringBoot starter管理了一些默认的依赖，定义了5.1.1以下的ElasticSearch默认版本，所以没有这个class.

您可以在自己的 pom 中显式定义属性以覆盖其定义。

<properties>
    <elasticsearch.version>5.1.1</elasticsearch.version>
</properties>

希望对您有所帮助。

Elasticsearch TransportClient NetworkPlugin NoClassDefFoundError

Elasticsearch TransportClient NetworkPlugin NoClassDefFoundError

spring

client

transport

elasticsearch

spring-boot