Elasticsearch Java客户端初始化失败

Question

我在尝试运行连接到Elasticsearch的应用程序时收到此错误消息。

An attempt was made to call the method org.elasticsearch.client.RestHighLevelClient.<init>(Lorg/elasticsearch/client/RestClientBuilder;)V but it does not exist. Its class, org.elasticsearch.client.RestHighLevelClient, is available from the following locations:

jar:file:/path/application/target/application-0.0.1-SNAPSHOT.jar!/BOOT-INF/lib/elasticsearch-rest-high-level-client-5.6.3.jar!/org/elasticsearch/client/RestHighLevelClient.class

It was loaded from the following location:

jar:file:/path/application/target/application-0.0.1-SNAPSHOT.jar!/BOOT-INF/lib/elasticsearch-rest-high-level-client-5.6.3.jar!/

Action:

Correct the classpath of your application so that it contains a single, compatible version of org.elasticsearch.client.RestHighLevelClient

该应用程序的构建没有错误，并且我的maven存储库中只有一个版本的elasticsearch SDK。

这是我pom的相关部分：

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.0.RELEASE</version>
        <relativePath />
    </parent>

    <dependency>
        <groupId>org.elasticsearch</groupId>
        <artifactId>elasticsearch</artifactId>
        <version>5.6.3</version>
    </dependency>

    <dependency>
        <groupId>org.elasticsearch.client</groupId>
        <artifactId>elasticsearch-rest-client</artifactId>
        <version>5.6.3</version>
    </dependency>
    <dependency>
        <groupId>org.elasticsearch.client</groupId>
        <artifactId>elasticsearch-rest-high-level-client</artifactId>
        <version>5.6.3</version>
        <exclusions>
            <exclusion>
                <groupId>org.elasticsearch.client</groupId>
                <artifactId>elasticsearch-rest-client</artifactId>
            </exclusion>
            <exclusion>
                <groupId>org.elasticsearch</groupId>
                <artifactId>elasticsearch</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

这是我在运行应用程序时遇到的异常：

org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.elasticsearch.client.RestHighLevelClient]: Factory method 'restHighLevelClient' threw exception; nested exception is java.lang.NoSuchMethodError: org.elasticsearch.client.RestHighLevelClient.<init>(Lorg/elasticsearch/client/RestClientBuilder;)V

这就是我初始化RestHighLevelClient的方式：

RestClientBuilder builder = RestClient
                .builder(new HttpHost(hostname, port, scheme));
builder.setMaxRetryTimeoutMillis(timeout);
RestHighLevelClient restHighLevelClient = new RestHighLevelClient(builder.build());

Answer 1

Spring Boot将尝试自动配置elasticsearch，该弹性搜索将在内部使用Elastic 6 RestHighLevelClient（org.elasticsearch.client.RestClientBuilder builder）创建弹性客户端。如果要连接到旧版本的elasticsearch，请排除elasticsearch自动配置。

@EnableAutoConfiguration(exclude={ElasticsearchAutoConfiguration.class, RestClientAutoConfiguration.class})