Question

尝试运行连接到Elasticsearch的应用程序时出现此错误消息。

An attempt was made to call the method org.elasticsearch.client.RestHighLevelClient.<init>(Lorg/elasticsearch/client/RestClientBuilder;)V but it does not exist. Its class, org.elasticsearch.client.RestHighLevelClient, is available from the following locations:

jar:file:/path/application/target/application-0.0.1-SNAPSHOT.jar!/BOOT-INF/lib/elasticsearch-rest-high-level-client-5.6.3.jar!/org/elasticsearch/client/RestHighLevelClient.class

It was loaded from the following location:

jar:file:/path/application/target/application-0.0.1-SNAPSHOT.jar!/BOOT-INF/lib/elasticsearch-rest-high-level-client-5.6.3.jar!/

Action:

Correct the classpath of your application so that it contains a single, compatible version of org.elasticsearch.client.RestHighLevelClient

该应用程序的构建没有错误，并且我的maven存储库中只有一个版本的elasticsearch SDK。

这是我pom的相关部分：

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.0.RELEASE</version>
        <relativePath />
    </parent>

    <dependency>
        <groupId>org.elasticsearch</groupId>
        <artifactId>elasticsearch</artifactId>
        <version>5.6.3</version>
    </dependency>

    <dependency>
        <groupId>org.elasticsearch.client</groupId>
        <artifactId>elasticsearch-rest-client</artifactId>
        <version>5.6.3</version>
    </dependency>
    <dependency>
        <groupId>org.elasticsearch.client</groupId>
        <artifactId>elasticsearch-rest-high-level-client</artifactId>
        <version>5.6.3</version>
        <exclusions>
            <exclusion>
                <groupId>org.elasticsearch.client</groupId>
                <artifactId>elasticsearch-rest-client</artifactId>
            </exclusion>
            <exclusion>
                <groupId>org.elasticsearch</groupId>
                <artifactId>elasticsearch</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

这是我在运行应用程序时遇到的异常：

org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.elasticsearch.client.RestHighLevelClient]: Factory method 'restHighLevelClient' threw exception; nested exception is java.lang.NoSuchMethodError: org.elasticsearch.client.RestHighLevelClient.<init>(Lorg/elasticsearch/client/RestClientBuilder;)V

这是我初始化RestHighLevelClient的方式：

RestClientBuilder builder = RestClient
                .builder(new HttpHost(hostname, port, scheme));
builder.setMaxRetryTimeoutMillis(timeout);
RestHighLevelClient restHighLevelClient = new RestHighLevelClient(builder.build());

Answer 1

Spring Boot将尝试自动配置elasticsearch，该搜索将在内部使用Elastic 6 RestHighLevelClient（org.elasticsearch.client.RestClientBuilder builder）创建弹性客户端。如果要连接到旧版本的elasticsearch，请排除elasticsearch自动配置。

@EnableAutoConfiguration(exclude={ElasticsearchAutoConfiguration.class, RestClientAutoConfiguration.class})

Answer 2

通过查看异常

java.lang.NoSuchMethodError: org.elasticsearch.client.RestHighLevelClient.<init>(Lorg/elasticsearch/client/RestClientBuilder;)

RestHighLevelClient中没有构造函数，RestClientBuilder中没有<version>5.6.3</version>作为参数。

您尝试使用版本<version>7.0.0-alpha1</version>吗？

更新：

异常An attempt was made to call the method org.elasticsearch.client.RestHighLevelClient.<init>(Lorg/elasticsearch/client/RestClientBuilder; 告诉代码它是在尝试执行属于elasticsearch版本6的方法。在您的情况下，也许您在运行时提供了多个版本的Elasticsearch库，或者您的代码可能已被版本6编译，但在运行时提供了版本5。

Answer 3

如果您使用的是Spring Boot 2.3.x + Elasticsearch客户端5.6.6，请参考以下配置，以了解是否有帮助。
我们最近将Spring Boot升级到2.3.3，而ELK仍在5.6.6上。该错误与Spring自动配置ES tfp.distributions.HiddenMarkovModel()有关，因此另一种解决方案是“手动配置”，并且可以在以后的其他地方使用。

RestClient

pom：

import org.apache.http.HttpHost;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class EsConfig {

    @Value("${elasticsearch.host}")
    private String esHost;

    @Value("${elasticsearch.port}")
    private int esPort;
    
    @Value("${elasticsearch.prefix}")
    private String esPrefix;

    @Bean
    public RestClient lowLevelClient() {
        return RestClient.builder(new HttpHost(esHost, esPort, "http")).setPathPrefix(esPrefix)
                .setRequestConfigCallback(builder -> builder.setConnectTimeout(1000).setSocketTimeout(5000)).build();
    }

    @Bean
    public RestHighLevelClient restHighLevelClient() {
        return new RestHighLevelClient(this.lowLevelClient());
    }

// ------ before upgrade
//  @Bean
//  public RestHighLevelClient restHighLevelClient() {
//      RestClient rc = RestClient.builder(new HttpHost(esHost, esPort, "http")).setPathPrefix(esPrefix)
//      .setRequestConfigCallback(builder -> builder.setConnectTimeout(1000).setSocketTimeout(5000)).build();
//      return new RestHighLevelClient(rc);
//  }
}

Elasticsearch Java客户端初始化失败

3 个答案: