Spring elasticsearch java.net.UnknownHostException

Question

尝试更新一个小的实验性Spring Elasticsearch项目以反映3.2.6版本reference guide中的更改。

如前所述：TransportClient从Elasticsearch 7开始不推荐使用，并将在8中删除。试图重新配置为高级Rest Client。

但是出现以下错误

    Application run failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'elasticDatasource' defined in file [/Users/erichuang/Desktop/JE/00-Development/dev/lab/lab-elastic-search/lab-elastic-search/target/classes/com/elastic/labelasticsearch/config/ElasticDatasource.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'carElasticRepo': 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 org.springframework.data.elasticsearch.ElasticsearchException: Error while for indexExists request: org.elasticsearch.action.admin.indices.get.GetIndexRequest@b5d8ebb
    org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141)
    com.elastic.labelasticsearch.LabElasticSearchApplication.main(LabElasticSearchApplication.java:15)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:564)
    at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'carElasticRepo': 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 org.springframework.data.elasticsearch.ElasticsearchException: Error while for indexExists request: org.elasticsearch.action.admin.indices.get.GetIndexRequest@b5d8ebb
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1796)

    ... 24 common frames omitted

Caused by: java.net.UnknownHostException: localhost/<unresolved>: nodename nor servname provided, or not known
at java.base/java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.base/java.net.InetAddress$PlatformNameService.lookupAllHostAddr(InetAddress.java:932)
at java.base/java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1505)
at java.base/java.net.InetAddress$NameServiceAddresses.get(InetAddress.java:851)
at java.base/java.net.InetAddress.getAllByName0(InetAddress.java:1495)
at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1354)
at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1288)
...
... 63 common frames omitted

旧设置（有效）

ElasticSearchConfig

@Configuration
@EnableElasticsearchRepositories(basePackages = "com.elastic.labelasticsearch.repo")
public class ElasticSearchConfig  {
    private static final String esHost = "localhost";
    private static final int esPort = 9300;

    @Bean
    public Client client() throws UnknownHostException {
        var transportClient = new PreBuiltTransportClient(Settings.EMPTY);
        transportClient.addTransportAddress(new TransportAddress(InetAddress.getByName(esHost), esPort));

        return transportClient;
    }

    @Bean(name ={"elasticsearchOperations", "elasticsearchTemplate"})
    public ElasticsearchOperations esTemplate() throws UnknownHostException {
        return new ElasticsearchTemplate(client());
    }

    @Bean
    public RestTemplate restTemplate(){
       return new RestTemplate();
    }

}

新设置

@Configuration
@EnableElasticsearchRepositories(basePackages = "com.elastic.labelasticsearch.repo")
public class RestClientConfig extends AbstractElasticsearchConfiguration {

    @Override
    @Bean
    public RestHighLevelClient elasticsearchClient() {

        final ClientConfiguration clientConfiguration = ClientConfiguration.builder()
                .connectedTo("localhost:9300")
                .build();

        return RestClients.create(clientConfiguration).rest();
    }

}

我想念什么？

Answer 1

这是[14] Java 14中的更改所导致的错误。此问题已在4.0.RC2（昨天发布）中修复。