如何将AWS Elasticsearch 7.x与Spring Boot成功连接？

这个错误的核心原因是客户端库与AWS OpenSearch（原AWS Elasticsearch）的版本不兼容，或是误用了针对纯OSS版Elasticsearch的客户端组件。以下是针对性的解决步骤：

1. 确保依赖版本完全匹配 #

Spring Data Elasticsearch的版本必须与AWS OpenSearch的版本严格对应，避免跨版本适配问题：

• Spring Boot 3.x → Spring Data Elasticsearch 5.x → 适配OpenSearch 2.x
• Spring Boot 2.x → Spring Data Elasticsearch 4.x → 适配OpenSearch 1.x/旧版AWS Elasticsearch

推荐使用Maven依赖示例（Spring Boot 3.x）：

<!-- Spring Data Elasticsearch 核心依赖 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
</dependency>
<!-- AWS OpenSearch SDK 适配依赖 -->
<dependency>
    <groupId>software.amazon.awssdk</groupId>
    <artifactId>opensearch</artifactId>
</dependency>

2. 配置正确的客户端实例 #

禁用自动配置的通用Elasticsearch客户端，改用适配AWS OpenSearch的配置：

代码配置方式（IAM认证场景） #

@Configuration
public class OpenSearchClientConfig {

    @Value("${aws.opensearch.endpoint}")
    private String opensearchEndpoint;

    @Value("${aws.region}")
    private String awsRegion;

    @Bean
    public RestHighLevelClient restHighLevelClient(AwsCredentialsProvider credentialsProvider) {
        Aws4Signer signer = Aws4Signer.create();
        signer.setRegion(Region.of(awsRegion));
        signer.setServiceName(OpenSearchServiceClient.SERVICE_NAME);

        RestClientBuilder restClientBuilder = RestClient.builder(HttpHost.create(opensearchEndpoint))
                .setHttpClientConfigCallback(httpClientBuilder -> 
                    httpClientBuilder.addInterceptorLast(
                        new AwsRequestSigningInterceptor("es", signer, credentialsProvider)
                    )
                );

        return new RestHighLevelClient(restClientBuilder);
    }

    @Bean
    public AwsCredentialsProvider awsCredentialsProvider() {
        // 使用默认AWS凭证链（环境变量、IAM角色、本地凭证文件等）
        return DefaultCredentialsProvider.create();
    }
}

配置文件方式（用户名密码认证场景） #

spring:
  elasticsearch:
    uris: ${AWS_OPENSEARCH_ENDPOINT}
    username: ${AWS_OPENSEARCH_USERNAME}
    password: ${AWS_OPENSEARCH_PASSWORD}
aws:
  region: ${AWS_REGION}

3. 排除冲突的OSS专用依赖 #

检查项目依赖树，若存在elasticsearch-rest-client-oss这类纯OSS版客户端组件，必须排除，避免与AWS OpenSearch的兼容性冲突：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
    <exclusions>
        <exclusion>
            <groupId>org.elasticsearch.client</groupId>
            <artifactId>elasticsearch-rest-client-oss</artifactId>
        </exclusion>
    </exclusions>
</dependency>

4. 验证版本对应关系 #

最后确认版本匹配：

内容的提问来源于stack exchange，提问作者sandesh a