spring-data-elasticsearch 最新版本使用 Elasticsearch 8.1 版本抛出 NullPointer 异常答案

【问题标题】：spring-data-elasticsearch latest version throws NullPointer exception with Elasticsearch 8.1 versionspring-data-elasticsearch 最新版本使用 Elasticsearch 8.1 版本抛出 NullPointer 异常
【发布时间】：2022-07-24 20:18:40
【问题描述】：

Planning to use elasticsearch 8.1 version and use 'org.springframework.boot:spring-boot-starter-data-elasticsearch' in
我们的项目。 Repository.save() 引发以下异常。
java.lang.NullPointerException：空在 java.base/java.util.Objects.requireNonNull(Objects.java:221) 在 org.elasticsearch.action.DocWriteResponse.(DocWriteResponse.java:116) 在 org.elasticsearch.action.index.IndexResponse.(IndexResponse.java:43)
The same code with Elasticsearch 7.15.2 works fine.

I see the supported matrix  here https://docs.spring.io/spring-data/elasticsearch/docs/current/reference/html/#preface.requirements
Where to see the road map of Spring boot elasticsearch data plugin? When Do we get the plugin support for the 8.1 version of
弹性搜索？提前致谢

【问题讨论】：

标签： spring-data-elasticsearch

【解决方案1】：

添加以下标头解决了该问题。

Accept: "application/vnd.elasticsearch+json;compatible-with=7"
Content-Type: "application/vnd.elasticsearch+json;compatible-with=7"

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【解决方案2】：

最好更改用于创建客户端的代码

package com.search.elasticsearchapp.config;

import org.apache.http.Header;
import org.apache.http.HttpHost;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.message.BasicHeader;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestClientBuilder;
import org.elasticsearch.client.RestHighLevelClient;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.elasticsearch.repository.config.EnableElasticsearchRepositories;
import org.springframework.http.HttpHeaders;

@Configuration
@EnableElasticsearchRepositories(basePackages = "*")
public class TestClient {

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

    @Value("${elasticsearch.port}")
    private int port;

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

    @Value("${elasticsearch.username}")
    private String userName;

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

    @Bean(destroyMethod = "close")
    public RestHighLevelClient restClient() {

        final CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
        credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(userName, password));

        RestClientBuilder builder = RestClient.builder(new HttpHost(host, port, protocol))
                .setHttpClientConfigCallback(httpClientBuilder -> httpClientBuilder.setDefaultCredentialsProvider(credentialsProvider))
                .setDefaultHeaders(compatibilityHeaders());

        return new RestHighLevelClient(builder);
    }

    private Header[] compatibilityHeaders() {
        return new Header[]{new BasicHeader(HttpHeaders.ACCEPT, "application/vnd.elasticsearch+json;compatible-with=7"), new BasicHeader(HttpHeaders.CONTENT_TYPE, "application/vnd.elasticsearch+json;compatible-with=7")};
    }
}

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