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

问题:

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]] 

回答1:

Resolution: the app is not a webapp because it doesn't have an embedded container (e.g. Tomcat) on the classpath. Adding one fixed it. If you are using Maven, then add this in pom.xml:

org.springframework.bootspring-boot-starter-web

For Gradle (build.gradle) it looks like

dependencies {     compile 'org.springframework.boot:spring-boot-starter-web' } 

回答2:

I had the same problem but when I removed

org.springframework.bootspring-boot-starter-tomcatprovided

it started working again.

回答3:

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

回答4:

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.

回答5:

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.

回答6:

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

文章来源: Why does my Spring Boot App always shutdown immediately after starting?