我一直在嘗試使用 JHipster 構建一個可以使用一些高級過濾的應用程式，特別是 ElasticSearch。為什么當我開箱即用時它會失敗，甚至沒有編輯專案？
我在 Windows 10 中運行以下軟體：
- Java v15.0.2
- 節點 v14.17.4
- NPM 6.14.14
在 Ubuntu 中也會發生同樣的情況：
- Java v17.0.1
- 節點 v16.14.0
- NPM 8.5.0
我遇到的問題很容易重現：
- 轉到在線版本https://start.jhipster.tech/generate-application
- 保持一切原樣，并標記選項“使用 Elasticsearch 的搜索引擎”
- 單擊下載為 ZIP 檔案
- 使用 ./mvnw 解壓并運行
---> 構建已編譯但無法啟動，因為它無法實體化 bean 'userService'
完整跟蹤：
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userService' defined in file [C:\projects\JHipster\sample\target\classes\com\mycompany\myapp\service\UserService.class]: Unsatisfied dependency expressed through constructor parameter 2; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userSearchRepository' defined in com.mycompany.myapp.repository.search.UserSearchRepository defined in @EnableElasticsearchRepositories declared on DatabaseConfiguration: 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.UncategorizedElasticsearchException: java.util.concurrent.ExecutionException: java.net.ConnectException: Timeout connecting to [localhost/127.0.0.1:9200]; nested exception is ElasticsearchException[java.util.concurrent.ExecutionException: java.net.ConnectException: Timeout connecting to [localhost/127.0.0.1:9200]]; nested: ExecutionException[java.net.ConnectException: Timeout connecting to [localhost/127.0.0.1:9200]]; nested: ConnectException[Timeout connecting to [localhost/127.0.0.1:9200]];
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:800)
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:229)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1372)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1222)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:953)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583)
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:732)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:414)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:302)
at com.mycompany.myapp.JhipsterSampleApplicationApp.main(JhipsterSampleApplicationApp.java:69)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
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 'userSearchRepository' defined in com.mycompany.myapp.repository.search.UserSearchRepository defined in @EnableElasticsearchRepositories declared on DatabaseConfiguration: 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.UncategorizedElasticsearchException: java.util.concurrent.ExecutionException: java.net.ConnectException: Timeout connecting to [localhost/127.0.0.1:9200]; nested exception is ElasticsearchException[java.util.concurrent.ExecutionException: java.net.ConnectException: Timeout connecting to [localhost/127.0.0.1:9200]]; nested: ExecutionException[java.net.ConnectException: Timeout connecting to [localhost/127.0.0.1:9200]]; nested: ConnectException[Timeout connecting to [localhost/127.0.0.1:9200]];
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1804)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:620)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1389)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1309)
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:887)
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791)
... 22 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.elasticsearch.repository.support.SimpleElasticsearchRepository]: Constructor threw exception; nested exception is org.springframework.data.elasticsearch.UncategorizedElasticsearchException: java.util.concurrent.ExecutionException: java.net.ConnectException: Timeout connecting to [localhost/127.0.0.1:9200]; nested exception is ElasticsearchException[java.util.concurrent.ExecutionException: java.net.ConnectException: Timeout connecting to [localhost/127.0.0.1:9200]]; nested: ExecutionException[java.net.ConnectException: Timeout connecting to [localhost/127.0.0.1:9200]]; nested: ConnectException[Timeout connecting to [localhost/127.0.0.1:9200]];
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:224)
at org.springframework.data.repository.core.support.RepositoryFactorySupport.lambda$instantiateClass$5(RepositoryFactorySupport.java:578)
at java.base/java.util.Optional.map(Optional.java:258)
at org.springframework.data.repository.core.support.RepositoryFactorySupport.instantiateClass(RepositoryFactorySupport.java:578)
at org.springframework.data.repository.core.support.RepositoryFactorySupport.getTargetRepositoryViaReflection(RepositoryFactorySupport.java:543)
at org.springframework.data.elasticsearch.repository.support.ElasticsearchRepositoryFactory.getTargetRepository(ElasticsearchRepositoryFactory.java:74)
at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:324)
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.lambda$afterPropertiesSet$5(RepositoryFactoryBeanSupport.java:322)
at org.springframework.data.util.Lazy.getNullable(Lazy.java:230)
at org.springframework.data.util.Lazy.get(Lazy.java:114)
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:328)
at org.springframework.data.elasticsearch.repository.support.ElasticsearchRepositoryFactoryBean.afterPropertiesSet(ElasticsearchRepositoryFactoryBean.java:69)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1863)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1800)
... 33 common frames omitted
Caused by: org.springframework.data.elasticsearch.UncategorizedElasticsearchException: java.util.concurrent.ExecutionException: java.net.ConnectException: Timeout connecting to [localhost/127.0.0.1:9200]; nested exception is ElasticsearchException[java.util.concurrent.ExecutionException: java.net.ConnectException: Timeout connecting to [localhost/127.0.0.1:9200]]; nested: ExecutionException[java.net.ConnectException: Timeout connecting to [localhost/127.0.0.1:9200]]; nested: ConnectException[Timeout connecting to [localhost/127.0.0.1:9200]];
at org.springframework.data.elasticsearch.core.ElasticsearchExceptionTranslator.translateExceptionIfPossible(ElasticsearchExceptionTranslator.java:72)
at org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate.translateException(ElasticsearchRestTemplate.java:427)
at org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate.execute(ElasticsearchRestTemplate.java:410)
at org.springframework.data.elasticsearch.core.RestIndexTemplate.doExists(RestIndexTemplate.java:103)
at org.springframework.data.elasticsearch.core.AbstractIndexTemplate.exists(AbstractIndexTemplate.java:134)
at org.springframework.data.elasticsearch.repository.support.SimpleElasticsearchRepository.<init>(SimpleElasticsearchRepository.java:92)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:64)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:211)
... 46 common frames omitted
Caused by: org.elasticsearch.ElasticsearchException: java.util.concurrent.ExecutionException: java.net.ConnectException: Timeout connecting to [localhost/127.0.0.1:9200]
at org.elasticsearch.client.RestHighLevelClient.performClientRequest(RestHighLevelClient.java:2078)
at org.elasticsearch.client.RestHighLevelClient.internalPerformRequest(RestHighLevelClient.java:1732)
at org.elasticsearch.client.RestHighLevelClient.performRequest(RestHighLevelClient.java:1717)
at org.elasticsearch.client.IndicesClient.exists(IndicesClient.java:963)
at org.springframework.data.elasticsearch.core.RestIndexTemplate.lambda$doExists$2(RestIndexTemplate.java:103)
at org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate.execute(ElasticsearchRestTemplate.java:408)
... 55 common frames omitted
Caused by: java.util.concurrent.ExecutionException: java.net.ConnectException: Timeout connecting to [localhost/127.0.0.1:9200]
at org.elasticsearch.common.util.concurrent.BaseFuture$Sync.getValue(BaseFuture.java:262)
at org.elasticsearch.common.util.concurrent.BaseFuture$Sync.get(BaseFuture.java:249)
at org.elasticsearch.common.util.concurrent.BaseFuture.get(BaseFuture.java:76)
at org.elasticsearch.client.RestHighLevelClient.performClientRequest(RestHighLevelClient.java:2075)
... 60 common frames omitted
Caused by: java.net.ConnectException: Timeout connecting to [localhost/127.0.0.1:9200]
at org.apache.http.nio.pool.RouteSpecificPool.timeout(RouteSpecificPool.java:169)
at org.apache.http.nio.pool.AbstractNIOConnPool.requestTimeout(AbstractNIOConnPool.java:632)
at org.apache.http.nio.pool.AbstractNIOConnPool$InternalSessionRequestCallback.timeout(AbstractNIOConnPool.java:898)
at org.apache.http.impl.nio.reactor.SessionRequestImpl.timeout(SessionRequestImpl.java:198)
at org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor.processTimeouts(DefaultConnectingIOReactor.java:213)
at org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor.processEvents(DefaultConnectingIOReactor.java:158)
at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor.execute(AbstractMultiworkerIOReactor.java:351)
at org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager.execute(PoolingNHttpClientConnectionManager.java:221)
at org.apache.http.impl.nio.client.CloseableHttpAsyncClientBase$1.run(CloseableHttpAsyncClientBase.java:64)
at java.base/java.lang.Thread.run(Thread.java:832)
Exception in thread "Logback shutdown hook [default]" java.util.ConcurrentModificationException
at java.base/java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1013)
at java.base/java.util.ArrayList$Itr.next(ArrayList.java:967)
at ch.qos.logback.classic.LoggerContext.fireOnReset(LoggerContext.java:323)
at ch.qos.logback.classic.LoggerContext.reset(LoggerContext.java:226)
at ch.qos.logback.classic.LoggerContext.stop(LoggerContext.java:348)
at ch.qos.logback.core.hook.ShutdownHookBase.stop(ShutdownHookBase.java:39)
at ch.qos.logback.core.hook.DelayingShutdownHook.run(DelayingShutdownHook.java:57)
at java.base/java.lang.Thread.run(Thread.java:832)
uj5u.com熱心網友回復：
[java.util.concurrent.ExecutionException：java.net.ConnectException：超時連接到[localhost/127.0.0.1:9200]]；嵌套：ExecutionException[java.net.ConnectException：超時連接到 [localhost/127.0.0.1:9200]]；
如果您進一步查看堆疊跟蹤，您會發現應用程式根本無法連接到 localhost:9200，這是 Elasticsearch 本地實體的默認地址。
您首先需要在您的機器上運行 elasticsearch 以使應用程式正常作業。您可以在 docker https://docs.docker.com/get-docker/中快速完成
安裝 docker，然后輸入下載鏡像：
docker pull docker.elastic.co/elasticsearch/elasticsearch:8.0.0
在您可以使用 elasticsearch 啟動容器之后
docker run --name es01 -p 9200:9200 -it docker.elastic.co/elasticsearch/elasticsearch:8.0.0
轉載請註明出處，本文鏈接：https://www.uj5u.com/caozuo/428937.html