ElasticSearchHighLevelClient springboot Autoconfiguration not working - spring-boot

Question

I am trying to autoconfigure elasticsearch high-level rest client using this documentation
https://docs.spring.io/spring-boot/docs/current/reference/html/spring-boot-features.html#boot-features-elasticsearch
I added the following properties to my application.properties:
spring.elasticsearch.rest.uris=https://hostname.com
spring.elasticsearch.rest.read-timeout=10s
spring.elasticsearch.rest.username= user
spring.elasticsearch.rest.password= password
I added these dependencies in my pom.xml
<dependency>
<groupId>org.elasticsearch</groupId>
<artifactId>elasticsearch</artifactId>
<version>${elasticsearch.version}</version>
</dependency>
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>elasticsearch-rest-client</artifactId>
<version>${elasticsearch.version}</version>
</dependency>
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>elasticsearch-rest-high-level-client</artifactId>
<version>${elasticsearch.version}</version>
</dependency>
and a property
<elasticsearch.version>7.2.1</elasticsearch.version>
In my application I did this
#Configuration
#EnableAutoConfiguration
#SpringBootApplication
#ComponentScan
public class MainClass {
public static void main(String[] args) {
SpringApplication.run(MainClass.class, args);
}
}
But when I try to use the HighLevelClient it gives me NullPointerException
#Autowired
private RestHighLevelClient client;
Am I missing something?

Answer 1

You should add the stacktrace for the NullPointerException.
You did not write which versions you use (Spring Boot, Spring Data Elasticsearch). But the current Spring Boot 2.2.2 targets Spring Data Elasticsearch 3.2.x which uses Elasticsearch 6.8.5. So this won't work with an Elasticsearch 7 cluster. Support for Elasticsearch 7 is coming with the next version (Spring Data Elasticsearch 4.0)

Answer 2

I hope you are using spring-boot-autoconfigure dependency because RestHighLevelClient bean is initialized by this library based on the presence of RestHighLevelClient in the classpath. Check the dependency tree for the presence of spring-boot-autoconfigure.