ElasticSearch 8.0+ 版本Windows系统启动

解压\elasticsearch\elasticsearch-8.5.1

问题1：

warning: ignoring JAVA_HOME=D:\jdk1.8.0_271; using bundled JDK

JDK问题，使用ES自带JDK

修改elasticsearch-env.bat文件

set JAVA="%ES_HOME%\jdk\bin\java.exe"
set JAVA_HOME="%ES_HOME%\jdk"

启动elasticsearch.bat

问题2：

 内存问题，修改\elasticsearch-8.5.1\config\jvm.options文件

启动elasticsearch.bat

问题3 

启动elasticsearch.bat成功。

记录密码

修改密码

修改elasticsearch.yml 改为

xpack.security.enabled: true

./elasticsearch-setup-passwords interactive

出现异常

 修改命令

./elasticsearch-reset-password -u elastic -i

修改密码完成

问题4 

最大的坑！！！！！

最大的坑！！！！！

最大的坑！！！！！

 依赖配置

        <dependency>
            <groupId>org.elasticsearch</groupId>
            <artifactId>elasticsearch</artifactId>
            <version>8.7.1</version>
        </dependency>
        <dependency>
            <groupId>co.elastic.clients</groupId>
            <artifactId>elasticsearch-java</artifactId>
            <version>8.7.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-pool2</artifactId>
            <version>2.8.1</version>
        </dependency>
        <dependency>
            <groupId>jakarta.json</groupId>
            <artifactId>jakarta.json-api</artifactId>
            <version>2.0.1</version>
        </dependency>

代码

 try {
    HttpHost[] httpHosts = Arrays.stream(clusterNodes.split(",")).map(x -> {
        String[] hostInfo = x.split(":");
        return new HttpHost(hostInfo[0], Integer.parseInt(hostInfo[1]));
    }).toArray(HttpHost[]::new);

    final CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
    //设置账号密码
   credentialsProvider.setCredentials(
        AuthScope.ANY, new UsernamePasswordCredentials(account, passWord));

   builder = RestClient.builder(httpHosts)
        .setHttpClientConfigCallback(httpClientBuilder ->
         httpClientBuilder.setDefaultCredentialsProvider(credentialsProvider));
   // Create the low-level client
   restClient = builder.build();
   // Create the transport with a Jackson mapper
   transport = new RestClientTransport(restClient, new JacksonJsonpMapper());
   // And create the API client
   client = new ElasticsearchClient(transport);
   Boolean acknowledged = client.indices().create(c -> c.index("user")).acknowledged();
   System.out.println("<<<<<<<<<<<<<<<acknowledged>>>>>>>>>>>>>>>>>>>" + acknowledged);
} catch (Exception e) {
   e.printStackTrace();
}