使用 Jhipster 应用程序获取用户创建异常答案

【问题标题】：Getting User Creation Exception With the Jhipster Application使用 Jhipster 应用程序获取用户创建异常
【发布时间】：2021-05-10 16:39:00
【问题描述】：

我已经使用 Jhipster (Angular, MySQL) 成功生成了应用程序。作为管理员，我已登录并尝试创建新用户，但出现以下错误。

2021-05-10 21:55:14.218 ERROR 29756 --- [  XNIO-1 task-2] com.kc.bsadhana.service.UserService      : Exception in createUser() with cause = 'java.lang.RuntimeException: Connection refused' and exception = 'Connection refused; nested exception is java.lang.RuntimeException: Connection refused'

org.springframework.dao.DataAccessResourceFailureException: Connection refused; nested exception is java.lang.RuntimeException: Connection refused
    at org.springframework.data.elasticsearch.core.ElasticsearchExceptionTranslator.translateExceptionIfPossible(ElasticsearchExceptionTranslator.java:75)
    at org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate.translateException(ElasticsearchRestTemplate.java:362)
    at org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate.execute(ElasticsearchRestTemplate.java:345)
    at org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate.doIndex(ElasticsearchRestTemplate.java:143)

...

Caused by: java.lang.RuntimeException: Connection refused
    at org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate.translateException(ElasticsearchRestTemplate.java:360)
    ... 198 common frames omitted
Caused by: java.net.ConnectException: Connection refused
    at org.elasticsearch.client.RestClient.extractAndWrapCause(RestClient.java:849)
    at org.elasticsearch.client.RestClient.performRequest(RestClient.java:259)
    at org.elasticsearch.client.RestClient.performRequest(RestClient.java:246)
    at org.elasticsearch.client.RestHighLevelClient.internalPerformRequest(RestHighLevelClient.java:1613)
    at org.elasticsearch.client.RestHighLevelClient.performRequest(RestHighLevelClient.java:1583)
    at org.elasticsearch.client.RestHighLevelClient.performRequestAndParseEntity(RestHighLevelClient.java:1553)
    at org.elasticsearch.client.RestHighLevelClient.index(RestHighLevelClient.java:970)
    at org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate.lambda$doIndex$0(ElasticsearchRestTemplate.java:143)
    at org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate.execute(ElasticsearchRestTemplate.java:343)
    ... 197 common frames omitted
Caused by: java.net.ConnectException: Connection refused
    at java.base/sun.nio.ch.Net.pollConnect(Native Method)
    at java.base/sun.nio.ch.Net.pollConnectNow(Net.java:589)
    at java.base/sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:839)
    at org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor.processEvent(DefaultConnectingIOReactor.java:174)
    at org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor.processEvents(DefaultConnectingIOReactor.java:148)
    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)
    ... 1 common frames omitted

2021-05-10 21:55:14.238 ERROR 29756 --- [  XNIO-1 task-2] com.kc.bsadhana.web.rest.UserResource    : Exception in createUser() with cause = 'java.lang.RuntimeException: Connection refused' and exception = 'Connection refused; nested exception is java.lang.RuntimeException: Connection refused'

org.springframework.dao.DataAccessResourceFailureException: Connection refused; nested exception is java.lang.RuntimeException: Connection refused

在application-dev.yml 文件中，我输入了数据库凭据：

datasource:
    type: com.zaxxer.hikari.HikariDataSource
    url: jdbc:mysql://localhost:3306/bsadhana?useUnicode=true&characterEncoding=utf8&useSSL=false&useLegacyDatetimeCode=false&serverTimezone=UTC&createDatabaseIfNotExist=true
    username: root
    password: rxxxx!
    hikari:

甚至 jhipster 相关的表也是在我的数据库中创建的。但是当我尝试创建一个新用户时，它会抛出上述错误。还有其他地方需要我输入这些凭据吗？

【问题讨论】：

标签： jhipster

【解决方案1】：

错误表明您的应用无法连接到您的 Elasticsearch 实例，您应确保使用以下命令启动它，如 in the doc 所述：

docker-compose -f src/main/docker/elasticsearch.yml up

【讨论】：