Spring boot弹性搜索在服务器启动时失败

Question

import javax.persistence.Id;

import org.springframework.data.elasticsearch.annotations.Document;
import org.springframework.data.elasticsearch.annotations.Field;
import org.springframework.data.elasticsearch.annotations.FieldType;


/**
 * The Class ElasticSearchSampleEntity.
 */
@Document(indexName = "Sample-index", type = "Sample-content")
public class ElasticSearchSampleEntity {

    /** The es Sample entity id. */
    @Id
    @Field(type = FieldType.Long, index = true, name = "id")
    private Long esSampleEntityId;


    /** The es no of questions. */
    @Field(type = FieldType.Integer, index = true)
    private Integer esNoOfQuestions;

    /** The es total marks. */
    @Field(type = FieldType.Integer, index = true)
    private Integer esTotalMarks;

    /** The es total time min. */
    @Field(type = FieldType.Short, index = true)
    private Short esTotalTimeMin;

    /** The es total time sec. */
    @Field(type = FieldType.Short, index = true)
    private Short esTotalTimeSec;

    /** The es occurances. */
    @Field(type = FieldType.Integer, index = true)
    private Integer esOccurances;


    /** The es rating. */
    @Field(type = FieldType.Float, index = true)
    private Float esRating;


    /** The es created on. */
    @Field(type = FieldType.Long, index = true)
    private Long esCreatedDate;

    /** The es updated on. */
    @Field(type = FieldType.Long, index = true)
    private Long esUpdatedDate;

    /** The es published date. */
    @Field(type = FieldType.Long, index = true)
    private Long publishedDate;

    /** The sample type id. */
    @Field(type = FieldType.Integer, index = true)
    private Integer sampleTypeId;


    //getter and setter

}

这应该创建一次索引，并将数据存储到elastic Server。然而，在部署过程中，我们有时会遇到以下错误（间歇性问题）。

[main] ERROR o.s.boot.SpringApplication.reportFailure - Application run failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'sampleController': Unsatisfied dependency expressed through field 'esSampleService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'elasticSearchSampleServiceImpl': Unsatisfied dependency expressed through field 'esSampleRepo'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'elasticSearchSampleRepository': Invocation of init method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.elasticsearch.repository.support.SimpleElasticsearchRepository]: Constructor threw exception; nested exception is java.lang.IllegalArgumentException: mapper [sampleTypeId] cannot be changed from type [long] to [integer]

SampleTypeId创建（或更新）的时间有时也一样长，尽管我们特别提到它是整数。这就是问题的起因。我已经检查了数据类型，同时保存到弹性数据库以及，这看起来很好。这是否意味着弹性索引会随着每次部署而更新。对于数据库，我们做spring.jpa.hibernate.ddl-auto=validate，对于弹性，我们能做同样的事情吗？我不明白为什么会发生这个问题。映射似乎没问题。请帮帮我。

Answer 1

下面的错误日志片段很重要。

构造函数引发异常；嵌套异常是java.lang.IllegalArgumentException:mapper[sampleTypeId]不能从类型[long]更改为[integer]

看起来，在前面创建的索引中，SampleTypeID被定义为Long，现在将其更改为int，这是不可能的，因此从ElasticSearch引发异常。