The bean 'xxxxx', defined in null, could not be registered. A bean with that name has already ...

这个异常是使用 spring-data-elasticsearch 并且集成 spring-data-jpa 时遇到的异常

Description:

The bean 'productBrandESRepository', defined in null, could not be registered. A bean with that name has already been defined in null and overriding is disabled.

Action:

Consider renaming one of the beans or enabling overriding by setting spring.main.allow-bean-definition-overriding=true

百度了半天没有结果

在官方文档上看到了如下信息（已经过goole翻译）

这个就说的很明白了，你放一起之后没有指定包，es就不知道这个绑定的到底是jpa的库还是es得库

然后我添加了如下代码：

@Configuration
@EnableJpaRepositories(basePackages = "com.mall.market.repository.jpa")
@EnableElasticsearchRepositories(basePackages = "com.mall.market.repository.es")
public class ElasticSearchConfiguration {

}

 这个报错问题就解决了。

但是还有别的坑啊：

1. elasticsearch 在6.x 之后得版本中一个index下只能有一个type
2. 我得主键名并不是id ,于是报了以下异常

No id property found for class com.mall.market.entity.ProductBrand!

我的ProductBrand 实体类是这样的

package com.mall.market.entity;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.data.elasticsearch.annotations.Document;

import javax.persistence.*;
import java.io.Serializable;

/**
 * @author lidai
 * @date 2019/7/12 14:46
 * 

 * 品牌信息
 */
@Data
@Entity
@Table(name = "market_product_brand")
@NoArgsConstructor
@AllArgsConstructor
//声明存储于索引库为mall_demo下，类型为ProductBrand
@Document(indexName = "mall_product_brand", type = "ProductBrand")
public class ProductBrand implements Serializable {

    private static final long serialVersionUID = 4066518364159966368L;

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "brand_id")
    private Long brandId;

    @Column(name = "brand_name")
    private String brandName;

    @Column(name = "telephone")
    private String telephone;

    @Column(name = "brand_web")
    private String brandWeb;

    @Column(name = "brand_desc")
    private String brandDesc;

    @Column(name = "brand_logo")
    private String brandLogo;

    @Column(name = "brand_status")
    private String brandStatus;

    @Column(name = "brand_order")
    private Integer brandOrder;


}

当我把 brandId 直接改成了id 这个异常就消失了，我也不清楚是为什么。

还可以通过添加@Id注解解决

@org.springframework.data.annotation.Id//声明es主键