Spring + ES 8 server, can't make it compatible

Hi!

So, I'm new to ES and been running ES locally through docker on ES 7.17.3 with RestHighLevelClient, Spring Data ES and running queries with QueryBuilders etc.

Now I've been hosting Elastic Search through your/their cloud and the version is 8.4.x and with that I've been trying to read the documentations on how to run on 7.17 client towards a 8.4 server. I can't make it work and would be amazing to have some eyes with experience to look at it.

Been reading this document and some around it... but I'm starting to get tangled up and my head is just a mess..

This is my configuration,

@Configuration
public class ElasticSearchClientConfig
{
    @Value("${elasticsearch.url}")
    private String elasticsearchUrl;

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

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


    private String username = "testuser";
    private String password = "testuser";


    CredentialsProvider credentials = new BasicCredentialsProvider();

    @Bean
    public RestClient getRestClient() {

        credentials.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(username,password));

        System.out.println(credentials.getCredentials(AuthScope.ANY).getPassword());


        RestClient restClient = RestClient.builder(
                new HttpHost(elasticSearchHost, getElasticSearchPort)).setHttpClientConfigCallback(httpAsyncClientBuilder ->
                httpAsyncClientBuilder.setDefaultCredentialsProvider(credentials)).build();

        return restClient;
    }

    @Bean
    public RestHighLevelClient hlrc() {
        return new RestHighLevelClientBuilder(getRestClient())
                .setApiCompatibilityMode(true)
                .build();
    }

    @Bean
    public  ElasticsearchTransport getElasticsearchTransport() {
        return new RestClientTransport(
                getRestClient(), new JacksonJsonpMapper());
    }

    @Bean
    public ElasticsearchClient getElasticsearchClient() {
        ElasticsearchClient client = new ElasticsearchClient(getElasticsearchTransport());
        return client;
    }

    @Bean
    public ElasticsearchOperations elasticsearchTemplate() {
        return new ElasticsearchRestTemplate(hlrc());
    }

}

This is my dependencies:

       <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-elasticsearch</artifactId>
            <version>4.4.2</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
            <version>2.7.1</version>
        </dependency>

        <dependency>
            <groupId>org.elasticsearch.client</groupId>
            <artifactId>elasticsearch-rest-client</artifactId>
            <version>7.17.6</version>
        </dependency>

        <dependency>
            <groupId>org.elasticsearch.client</groupId>
            <artifactId>elasticsearch-rest-high-level-client</artifactId>
            <version>7.17.6</version>
        </dependency>

        <dependency>
            <groupId>org.elasticsearch</groupId>
            <artifactId>elasticsearch</artifactId>
            <version>8.4.1</version>
        </dependency>

        <dependency>
            <groupId>co.elastic.clients</groupId>
            <artifactId>elasticsearch-java</artifactId>
            <version>7.17.3</version>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.12.3</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-amqp</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>

This is the errormessage I recieve right now..

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'hlrc' defined in class path resource [com/mestro/index/config/ElasticSearchClientConfig.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.elasticsearch.client.RestHighLevelClient]: Factory method 'hlrc' threw exception; nested exception is java.lang.NoClassDefFoundError: org/elasticsearch/action/admin/indices/flush/SyncedFlushRequest
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:658) ~[spring-beans-5.3.19.jar:5.3.19]
	at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:486) ~[spring-beans-5.3.19.jar:5.3.19]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1352) ~[spring-beans-5.3.19.jar:5.3.19]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1195) ~[spring-beans-5.3.19.jar:5.3.19]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) ~[spring-beans-5.3.19.jar:5.3.19]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.19.jar:5.3.19]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.19.jar:5.3.19]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.19.jar:5.3.19]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.19.jar:5.3.19]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.19.jar:5.3.19]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:953) ~[spring-beans-5.3.19.jar:5.3.19]
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918) ~[spring-context-5.3.19.jar:5.3.19]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.19.jar:5.3.19]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.6.7.jar:2.6.7]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:740) ~[spring-boot-2.6.7.jar:2.6.7]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:415) ~[spring-boot-2.6.7.jar:2.6.7]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) ~[spring-boot-2.6.7.jar:2.6.7]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312) ~[spring-boot-2.6.7.jar:2.6.7]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) ~[spring-boot-2.6.7.jar:2.6.7]
	at com.mestro.index.IndexApplication.main(IndexApplication.java:24) ~[classes/:na]
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.elasticsearch.client.RestHighLevelClient]: Factory method 'hlrc' threw exception; nested exception is java.lang.NoClassDefFoundError: org/elasticsearch/action/admin/indices/flush/SyncedFlushRequest
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.3.19.jar:5.3.19]
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:653) ~[spring-beans-5.3.19.jar:5.3.19]
	... 19 common frames omitted
Caused by: java.lang.NoClassDefFoundError: org/elasticsearch/action/admin/indices/flush/SyncedFlushRequest
	at org.elasticsearch.client.RestHighLevelClient.<init>(RestHighLevelClient.java:276) ~[elasticsearch-rest-high-level-client-7.17.6.jar:7.17.6]
	at org.elasticsearch.client.RestHighLevelClientBuilder.build(RestHighLevelClientBuilder.java:53) ~[elasticsearch-rest-high-level-client-7.17.6.jar:7.17.6]
	at com.mestro.index.config.ElasticSearchClientConfig.hlrc(ElasticSearchClientConfig.java:139) ~[classes/:na]
	at com.mestro.index.config.ElasticSearchClientConfig$$EnhancerBySpringCGLIB$$2e86fa2a.CGLIB$hlrc$0(<generated>) ~[classes/:na]
	at com.mestro.index.config.ElasticSearchClientConfig$$EnhancerBySpringCGLIB$$2e86fa2a$$FastClassBySpringCGLIB$$4fc9a5ef.invoke(<generated>) ~[classes/:na]
	at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) ~[spring-core-5.3.19.jar:5.3.19]
	at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:331) ~[spring-context-5.3.19.jar:5.3.19]
	at com.mestro.index.config.ElasticSearchClientConfig$$EnhancerBySpringCGLIB$$2e86fa2a.hlrc(<generated>) ~[classes/:na]
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104) ~[na:na]
	at java.base/java.lang.reflect.Method.invoke(Method.java:577) ~[na:na]
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.3.19.jar:5.3.19]
	... 20 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.elasticsearch.action.admin.indices.flush.SyncedFlushRequest
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641) ~[na:na]
	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188) ~[na:na]
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521) ~[na:na]
	... 31 common frames omitted


Process finished with exit code 1

If stuff doesn't make sense, please try to explain for me.. I'm lost.
Thank you in advance!

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