Spring Boot Application Not Starting and no exception - spring

Question

I am using spring boot version: 2.3.5.RELEASE, with only the main class which I am trying to start. When I run the main class, I get the below message and the application fails to start without any error.
2020-11-03 12:39:17.871 INFO 15426 --- [ main] com.rahul.poc.HealthcheckApplication : Starting HealthcheckApplication on INMLTCU6LVCG with PID 15426 (/Users/rahul/Documents/Rahul/Projects/healthcheck/target/classes started by rahul in /Users/rahul/Documents/Rahul/Projects/healthcheck)
2020-11-03 12:39:17.873 INFO 15426 --- [ main] com.rahul.poc.HealthcheckApplication : No active profile set, falling back to default profiles: default
2020-11-03 12:39:18.617 INFO 15426 --- [ main] com.rahul.poc.HealthcheckApplication : Started HealthcheckApplication in 1.353 seconds (JVM running for 1.806)
Process finished with exit code 0
The pom.xml looks like below:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.5.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.rahul.poc</groupId>
<artifactId>healthcheck</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>Healthcheck</name>
<description>Healthcheck POC</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<!-- <scope>test</scope>-->
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
The main class as:
package com.rahul.poc;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class HealthcheckApplication {
public static void main(String[] args) {
SpringApplication.run(HealthcheckApplication.class, args);
}
}
I don't have any other class or configuration.

Answer 1

I believe that your problem is that you haven't added a starter package reference that adds a server component to your app, or otherwise adds anything that stays alive and does anything. I think your app is running, and then exiting because it has not been configured to run anything on a continual basis.
The most common thing you're missing that would cause your app to stay running is the web starter. Add this as a Maven dependency, and you should get behavior more like what you expect:
<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-web</artifactId>
</dependency>