Why does Spring Boot web app close immediately after starting?

Question

Using STS, if I import the \"Rest Service\" Getting Started project using the latest Spring Boot and choose \"Run As Spring Boot App\", it starts up, t

Answer 1

In addition, you should check that you have at least one rest controller in your app (@RestController) and make sure you compile with spring-boot-starter-tomcat

providedRuntime ('org.springframework.boot:spring-boot-starter-tomcat')

Answer 2

In my case the log4j.properties was missing.

Answer 3

In my case, I had a syntax error in application.properties:

application.password.numberOfLoginAttempts=5;

The semicolon at the end caused Spring to shutdown silently with error code 0

Answer 4

I had this same issue. To make it work I had to adjust the pom.xml and comment-out the 'provided' scope for spring-boot-starter-tomcat artifact and update the dependencies.

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-tomcat</artifactId>
    <!--<scope>provided</scope>-->
</dependency>

Now it starts up as expected! Thanks to some of the other answers that put me on the right track.