[java] Why does my Spring Boot App always shutdown immediately after starting?

This is my first Spring Boot code. Unfortunately, it always shuts down. I was expecting it to run continuously so that my web client can get some data from the browser.

package hello;
import org.springframework.boot.*;
import org.springframework.boot.autoconfigure.*;
import org.springframework.stereotype.*;
import org.springframework.web.bind.annotation.*;

@Controller
@EnableAutoConfiguration
public class SampleController {

    @RequestMapping("/")
    @ResponseBody
    String home() {
        return "Hello World!";
    }

    public static void main(String[] args) throws Exception {
        SpringApplication.run(SampleController.class, args);
    }
}


[@localhost initial]$ java -jar build/libs/gs-spring-boot-0.1.0.jar

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::            (v1.0.0.RC4)

2014-03-13 09:20:24.805  INFO 14650 --- [           main] hello.SampleController                   : Starting SampleController on localhost.localdomain with PID 14650 (/home/xxx/dev/gs-spring-boot/initial/build/libs/gs-spring-boot-0.1.0.jar started by xxx)
2014-03-13 09:20:25.002  INFO 14650 --- [           main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@b9eec: startup date [Thu Mar 13 09:20:24 EDT 2014]; root of context hierarchy
2014-03-13 09:20:28.833  INFO 14650 --- [           main] o.s.b.a.e.jmx.EndpointMBeanExporter      : Registering beans for JMX exposure on startup
2014-03-13 09:20:30.148  INFO 14650 --- [           main] o.s.c.support.DefaultLifecycleProcessor  : Starting beans in phase 0
2014-03-13 09:20:30.154  INFO 14650 --- [           main] o.s.b.a.e.jmx.EndpointMBeanExporter      : Located managed bean 'requestMappingEndpoint': registering with JMX server as MBean [org.springframework.boot:type=Endpoint,name=requestMappingEndpoint]
2014-03-13 09:20:30.316  INFO 14650 --- [           main] o.s.b.a.e.jmx.EndpointMBeanExporter      : Located managed bean 'environmentEndpoint': registering with JMX server as MBean [org.springframework.boot:type=Endpoint,name=environmentEndpoint]
2014-03-13 09:20:30.335  INFO 14650 --- [           main] o.s.b.a.e.jmx.EndpointMBeanExporter      : Located managed bean 'healthEndpoint': registering with JMX server as MBean [org.springframework.boot:type=Endpoint,name=healthEndpoint]
2014-03-13 09:20:30.351  INFO 14650 --- [           main] o.s.b.a.e.jmx.EndpointMBeanExporter      : Located managed bean 'beansEndpoint': registering with JMX server as MBean [org.springframework.boot:type=Endpoint,name=beansEndpoint]
2014-03-13 09:20:30.376  INFO 14650 --- [           main] o.s.b.a.e.jmx.EndpointMBeanExporter      : Located managed bean 'infoEndpoint': registering with JMX server as MBean [org.springframework.boot:type=Endpoint,name=infoEndpoint]
2014-03-13 09:20:30.400  INFO 14650 --- [           main] o.s.b.a.e.jmx.EndpointMBeanExporter      : Located managed bean 'metricsEndpoint': registering with JMX server as MBean [org.springframework.boot:type=Endpoint,name=metricsEndpoint]
2014-03-13 09:20:30.413  INFO 14650 --- [           main] o.s.b.a.e.jmx.EndpointMBeanExporter      : Located managed bean 'traceEndpoint': registering with JMX server as MBean [org.springframework.boot:type=Endpoint,name=traceEndpoint]
2014-03-13 09:20:30.428  INFO 14650 --- [           main] o.s.b.a.e.jmx.EndpointMBeanExporter      : Located managed bean 'dumpEndpoint': registering with JMX server as MBean [org.springframework.boot:type=Endpoint,name=dumpEndpoint]
2014-03-13 09:20:30.450  INFO 14650 --- [           main] o.s.b.a.e.jmx.EndpointMBeanExporter      : Located managed bean 'autoConfigurationAuditEndpoint': registering with JMX server as MBean [org.springframework.boot:type=Endpoint,name=autoConfigurationAuditEndpoint]
2014-03-13 09:20:30.465  INFO 14650 --- [           main] o.s.b.a.e.jmx.EndpointMBeanExporter      : Located managed bean 'shutdownEndpoint': registering with JMX server as MBean [org.springframework.boot:type=Endpoint,name=shutdownEndpoint]
2014-03-13 09:20:30.548  INFO 14650 --- [           main] o.s.b.a.e.jmx.EndpointMBeanExporter      : Located managed bean 'configurationPropertiesReportEndpoint': registering with JMX server as MBean [org.springframework.boot:type=Endpoint,name=configurationPropertiesReportEndpoint]
2014-03-13 09:20:30.589  INFO 14650 --- [           main] hello.SampleController                   : Started SampleController in 7.396 seconds (JVM running for 9.569)
2014-03-13 09:20:30.608  INFO 14650 --- [       Thread-2] s.c.a.AnnotationConfigApplicationContext : Closing org.springframework.context.annotation.AnnotationConfigApplicationContext@b9eec: startup date [Thu Mar 13 09:20:24 EDT 2014]; root of context hierarchy
2014-03-13 09:20:30.610  INFO 14650 --- [       Thread-2] o.s.c.support.DefaultLifecycleProcessor  : Stopping beans in phase 0
2014-03-13 09:20:30.624  INFO 14650 --- [       Thread-2] o.s.b.a.e.jmx.EndpointMBeanExporter      : Unregistering JMX-exposed beans on shutdown

Please advise.

Thanks

P.S. build.gradle is the fault.

dependencies {
    // tag::jetty[]
    compile("org.springframework.boot:spring-boot-starter-web") {
        **exclude module: "spring-boot-starter-tomcat"**
    }

Once I took off the above line in bold, everything works. My application context now is correct. Thanks Dave

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::            (v1.0.0.RC4)

2014-03-13 13:58:08.965  INFO 7307 --- [           main] hello.Application                        : Starting
 Application on  with PID 7307 (/ladev/home/xxx/dev/gs-spring-boot/initial/build/libs/gs-spring-boo
t-0.1.0.jar started by xxx)
2014-03-13 13:58:09.021  INFO 7307 --- [           main] ationConfigEmbeddedWebApplicationContext : Refreshi
ng org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@45490eb5: startup
 date [Thu Mar 13 13:58:09 MDT 2014]; root of context hierarchy
2014-03-13 13:58:09.653  INFO 7307 --- [           main] o.s.b.f.s.DefaultListableBeanFactory     : Overridi
ng bean definition for bean 'beanNameViewResolver': replacing [Root bean: class [null]; scope=; abstract=fal
se; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanNam
e=org.springframework.boot.actuate.autoconfigure.ErrorMvcAutoConfiguration$WhitelabelErrorViewConfiguration;
 factoryMethodName=beanNameViewResolver; initMethodName=null; destroyMethodName=(inferred); defined in class
 path resource [org/springframework/boot/actuate/autoconfigure/ErrorMvcAutoConfiguration$WhitelabelErrorView
Configuration.class]] with [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3;
 dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.boot.autoconf
igure.web.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter; factoryMethodName=beanNameViewResolver; in
itMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/boot/au
toconfigure/web/WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter.class]]

Here is how you can fix it:

1. Check if you don't have dependency on spring-boot-starter-web in your pom.xml file. To get you pom.xml file right, use this link start.spring.io

2. If you have above dependency, but still facing the issue, it is highly possible that your embedded tomcat jars are present. To confirm this, run maven build in debug mode -

mvn spring-boot:run --debug

and look for messages like -

[WARNING] error reading /Users/sparrowmac1/.m2/repository/org/apache/tomcat/embed/tomcat-embed-core/8.5.20/tomcat-embed-core-8.5.20.jar; invalid LOC header (bad signature) [WARNING] error reading /Users/sparrowmac1/.m2/repository/com/fasterxml/jackson/core/jackson-core/2.8.10/jackson-core-2.8.10.jar; invalid LOC header (bad signature)

If such messages are present, purge your local maven repo and try again -

mvn dependency:purge-local-repository

I had the same problem but when I removed

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

it started working again.

Maybe it does not fit to your code but i found out if you have a code snippet like this:

@SpringBootApplication
public class SpringBootApacheKafkaApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringBootApacheKafkaApplication.class,args).close();
    }
}

then just remove the close() method. That's fixed my problem! Maybe I can help someone with that

In my case the problem was introduced when I fixed a static analysis error that the return value of a method was not used.

Old working code in my Application.java was:

    public static void main(String[] args) {        
      SpringApplication.run(Application.class, args);
    }

New code that introduced the problem was:

    public static void main(String[] args) {        
      try (ConfigurableApplicationContext context = 
          SpringApplication.run(Application.class, args)) {
        LOG.trace("context: " + context);
      }
    }

Obviously, the try with resource block will close the context after starting the application which will result in the application exiting with status 0. This was a case where the resource leak error reported by snarqube static analysis should be ignored.

If you have a circular spring injected dependency it will fail without warning, depending on the level of logging, and a few other factors.

Class A injects Class B, and Class B injects Class A. Via constructor, in this particular case.

If you don't want to make your spring a web application then just add @EnableAsync or @EnableScheduling to your Starter

@EnableAsync
@SpringBootApplication
public class App {
    public static void main(String[] args) {
        SpringApplication.run(App.class, args);
    }

}

in my case i already had the maven dependency to 'spring-boot-starter-web' and the project would start fine without auto-stopping when i run it as springboot app from within the IDE. however, when i deploy it to K8s, the app would start and auto-stop immediately. So i modified my main app class to extend SpringBootServletInitializer and this seems to have fixed the auto-stopping.

@SpringBootApplication public class MyApp extends SpringBootServletInitializer {  public static void main(String[] args) {
SpringApplication.run(MyApp.class, args);  }}

I went through the answers here and elsewhere and still had issues. It turned that (like the op), I was running in kubernetes, and the app was fine, but kubernetes had an issue.

I forgot to have my app start based on my port environment variable. So, kubernetes/helm was telling it to run on 8443 and to liveness probe that, but it was running on some other port (like 8123) from my application.properties.

The kubernetes events (get events) showed the live-ness probe was failing, so kubernetes was killing the pod/app every 30 seconds or so.

I think the right answer was at Why does Spring Boot web app close immediately after starting? about the starter-tomcat not being set and if set and running through the IDE, the provided scope should be commented off. Scope doesn't create an issue while running through command. I wonder why.

Anyways just added my additional thoughts.

With gradle, I replaced this line at build.gradle.kts file inside dependencies block

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

with this

compile("org.springframework.boot:spring-boot-starter-web")

and works fine.

In my case I fixed this issue like below:-

1. First I removed (apache) C:\Users\myuserId\.m2\repository\org\apache

2. I added below dependencies in my pom.xml file

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

3. I have changed the default socket by adding below lines in resource file ..\yourprojectfolder\src\main\resourcesand\application.properties(I manually created this file)

    server.port=8099
    [email protected]@
   

   for that I have added below block in my pom.xml under <build> section.

     <build>
     .
     .
    <resources>
       <resource>
           <directory>src/main/resources</directory>
           <filtering>true</filtering>
       </resource>
   </resources>
      .
      .    
     </build>
   

My final pom.xml file look like

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.bhaiti</groupId>
    <artifactId>spring-boot-rest</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>spring-boot-rest</name>
    <description>Welcome project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>

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

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

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

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

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
                <filtering>true</filtering>
            </resource>
        </resources>

    </build>


</project>

I had this problem, and in my case it was caused by a simple clumsy mistake: my class had:

@SpringBootApplication
public class MyApplication implements ApplicationRunner {

public static void main(String[] args) {
    SpringApplication.run(MyApplication.class, args);
}

public void run(ApplicationArguments args) throws Exception {

}

}

I removed the "implements ApplicationRunner" and the run method (which were there due to a copy-paste mistake) and then it worked

Just another possibility,

I replaced

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

with

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

and it started without any issues

I initialized a new SPring boot project in IntelliJIdea with Spring Boot dev tools, but in pom.xml I had only dependency

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

You need to have also artifact spring-boot-starter-web. Just add this dependency to pom.xml

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

My application is Spring boot batch and commenting below line in application.properties resolved the problem

spring.main.web-application-type=none

I was having a similar problem. I only had the following starter web package.

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

But it is not enough. You need to add a parent too to get other required dependencies.

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.2.4.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

this work with spring boot 2.0.0

replace

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

with

<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-core</artifactId>
<version>9.0.6</version>
    </dependency>