Elasticsearch Integration to Spring Boot

We are working on an e-commerce application. We are at the point of integrating Elasticsearch for the product search engine with Spring boot application with Spring data. We have tried different tutorials online (check links below) but they all doesn't run well. No indexes are added to the Elasticsearch.  We are using ES 6.3.1 and the maven dependency is as follows.

               

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

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Product Entity

@Entity
@Document(indexName = "product", type="default")
public class Product {

    @javax.persistence.Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long Id;
    private String Name;
    @Lob
    @Type(type = "text")
    private String Description;
    private String ShortDescript;
    private String Model;
    private String Brand;
    private String Sku;
    private String Isbn;
    private Integer Shipping;
    private BigDecimal SalePrice;
    private BigDecimal RegularPrice;
    private Integer Quantity;
    private Double Weight;

//other code here
}

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Product Repository

@Repository
public interface ProductRepository extends ElasticsearchCrudRepository<Product, Long> {

    @Query("select p from Product p where p.supplier.id = ?1")
    public Iterable<Product> GetAllProductsBySupplier(Long id);
   
}

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We have installed kibana locally and have tested with test data and it works. But not with the Spring Boot application. Need your help. Thanks

1. https://www.baeldung.com/spring-data-elasticsearch-tutorial
2.https://www.mkyong.com/spring-boot/spring-boot-spring-data-elasticsearch-example/