Spring Boot - 初始化期间的 rmi 连接错误

Question

我在启动由 spring 初始值设定项创建的 Spring Boot 应用程序时遇到问题。

mvn 命令堆栈跟踪

[DEBUG] Application argument(s): --spring.application.admin.enabled=true --spring.application.admin.jmx-name=org.springframework.boot:type=Admin,name=SpringApplication
[DEBUG] Environment variable(s): 
[DEBUG] Connecting to local MBeanServer at port 9001
[DEBUG] Waiting for spring application to start...
[DEBUG] MBean server at port 9001 is not up yet...
[DEBUG] Spring application is not ready yet, waiting 500ms (attempt 1)
[DEBUG] Connected to local MBeanServer at port 9001
[DEBUG] Waiting for spring application to start...
[DEBUG] Spring application is not ready yet, waiting 500ms (attempt 1)

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::                (v2.5.6)

2021-11-01 12:40:43.639  INFO 37902 --- [           main] com.example.demo1.Demo1Application       : Starting Demo1Application using Java 17 on dj-legion with PID 37902 (/home/dj/Documents/demo1/target/classes started by dj in /home/dj/Documents/demo1)
2021-11-01 12:40:43.642  INFO 37902 --- [           main] com.example.demo1.Demo1Application       : No active profile set, falling back to default profiles: default
[DEBUG] Spring application is not ready yet, waiting 500ms (attempt 2)
2021-11-01 12:40:44.185  INFO 37902 --- [           main] com.example.demo1.Demo1Application       : Started Demo1Application in 0.947 seconds (JVM running for 1.53)
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  2.931 s
[INFO] Finished at: 2021-11-01T12:40:44+01:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.5.6:start (default-cli) on project demo1: Could not figure out if the application has started: Failed to connect to MBean server at port 9001: Could not invoke shutdown operation: Connection refused to host: 127.0.0.1; nested exception is: 
[ERROR]         java.net.ConnectException: Connection refused

你知道如何解决这种错误吗？ 我尝试过使用较低的 java/maven/spring-boot 版本，但没有成功。

Answer 1

解决方法很简单。 我忘记了网络依赖，应用程序立即完成。

只需添加到您的pom.xml

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>