spring - 为什么 Spring Boot web app 启动后会立即关闭？

Question

使用 STS，如果我使用最新的 Spring Boot 导入 "Rest Service" Getting Started 项目并选择 "Run As Spring Boot App"，它会启动，然后立即关闭。

查看调试日志，Spring 出于某种原因决定该项目不是 Web 应用程序，但我不知道为什么。

如果我从 Spring Boot 1.1.1.RELEASE 切换到 1.0.1.RELEASE，项目按预期工作，并找到默认的 Tomcat 嵌入式服务器。

我在 1.1.1 发行说明中找不到任何暗示配置更改或任何内容的内容？

更新:重现和记录输出的步骤

我正在运行 STS 3.6.0.M1 和 Spring 4.0.5 以及 Spring Boot 1.1.1。我可以通过执行以下操作轻松重现这一点:

1. 导入 REST 服务入门应用。
2. 选择“作为 Spring Boot 项目运行”

3. 这是输出:

   :: Spring Boot ::        (v1.1.1.RELEASE)
   
   2014-06-14 11:08:34.226  INFO 47728 --- [           main] hello.Application                        : Starting Application on localhost with PID 47728 (/Users/pdrummond/src/sts/gs-rest-service-complete/target/classes started by pdrummond in /Users/pdrummond/src/sts/gs-rest-service-complete)
   2014-06-14 11:08:34.257  INFO 47728 --- [           main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@802b249: startup date [Sat Jun 14 11:08:34 BST 2014]; root of context hierarchy
   2014-06-14 11:08:34.680  INFO 47728 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup
   2014-06-14 11:08:34.908  INFO 47728 --- [           main] hello.Application                        : Started Application in 0.917 seconds (JVM running for 1.351)
   2014-06-14 11:08:36.397  INFO 47728 --- [       Thread-3] s.c.a.AnnotationConfigApplicationContext : Closing org.springframework.context.annotation.AnnotationConfigApplicationContext@802b249: startup date [Sat Jun 14 11:08:34 BST 2014]; root of context hierarchy
   2014-06-14 11:08:36.398  INFO 47728 --- [       Thread-3] o.s.j.e.a.AnnotationMBeanExporter        : Unregistering JMX-exposed beans on shutdown
   

4. 如果我编辑 pom 并将 spring-boot-starter-parent 更改为 1.0.1.RELEASE，它会按预期启动。

更新 2:添加了 --debug 命令的输出

     :: Spring Boot ::        (v1.1.1.RELEASE)

    2014-06-14 19:29:03.814  INFO 986 --- [           main] hello.Application                        : Starting Application on localhost with PID 986 (/Users/pdrummond/src/sts/gs-rest-service-complete/target/classes started by pdrummond in /Users/pdrummond/src/sts/gs-rest-service-complete)
    2014-06-14 19:29:03.816 DEBUG 986 --- [           main] o.s.boot.SpringApplication               : Loading source class hello.Application
    2014-06-14 19:29:03.838  INFO 986 --- [           main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@c163956: startup date [Sat Jun 14 19:29:03 BST 2014]; root of context hierarchy
    2014-06-14 19:29:04.177  INFO 986 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup
    2014-06-14 19:29:04.346 DEBUG 986 --- [           main] utoConfigurationReportLoggingInitializer : 


    =========================
    AUTO-CONFIGURATION REPORT
    =========================


    Positive matches:
    -----------------

       PropertyPlaceholderAutoConfiguration#propertySourcesPlaceholderConfigurer
          - @ConditionalOnMissingBean (types: org.springframework.context.support.PropertySourcesPlaceholderConfigurer; SearchStrategy: current) found no beans (OnBeanCondition)

       JacksonAutoConfiguration
          - @ConditionalOnClass classes found: com.fasterxml.jackson.databind.ObjectMapper (OnClassCondition)

       JacksonAutoConfiguration#jacksonObjectMapper
          - @ConditionalOnMissingBean (types: com.fasterxml.jackson.databind.ObjectMapper; SearchStrategy: all) found no beans (OnBeanCondition)

       JmxAutoConfiguration
          - @ConditionalOnClass classes found: org.springframework.jmx.export.MBeanExporter (OnClassCondition)
          - SpEL expression on org.springframework.boot.autoconfigure.jmx.JmxAutoConfiguration: ${spring.jmx.enabled:true} (OnExpressionCondition)

       JmxAutoConfiguration#mbeanServer
          - @ConditionalOnMissingBean (types: javax.management.MBeanServer; SearchStrategy: all) found no beans (OnBeanCondition)

       JmxAutoConfiguration#objectNamingStrategy
          - @ConditionalOnMissingBean (types: org.springframework.jmx.export.naming.ObjectNamingStrategy; SearchStrategy: all) found no beans (OnBeanCondition)

       HttpMessageConvertersAutoConfiguration
          - @ConditionalOnClass classes found: org.springframework.http.converter.HttpMessageConverter (OnClassCondition)

       HttpMessageConvertersAutoConfiguration#messageConverters
          - @ConditionalOnMissingBean (types: org.springframework.boot.autoconfigure.web.HttpMessageConverters; SearchStrategy: all) found no beans (OnBeanCondition)

       HttpMessageConvertersAutoConfiguration.ObjectMappers
          - @ConditionalOnClass classes found: com.fasterxml.jackson.databind.ObjectMapper (OnClassCondition)

       HttpMessageConvertersAutoConfiguration.ObjectMappers#mappingJackson2HttpMessageConverter
          - @ConditionalOnMissingBean (types: org.springframework.http.converter.json.MappingJackson2HttpMessageConverter; SearchStrategy: all) found no beans (OnBeanCondition)


    Negative matches:
    -----------------

       MessageSourceAutoConfiguration
          - Bundle found for spring.messages.basename: messages (MessageSourceAutoConfiguration.ResourceBundleCondition)

       RabbitAutoConfiguration
          - required @ConditionalOnClass classes not found: org.springframework.amqp.rabbit.core.RabbitTemplate,com.rabbitmq.client.Channel (OnClassCondition)

       AopAutoConfiguration
          - required @ConditionalOnClass classes not found: org.aspectj.lang.annotation.Aspect,org.aspectj.lang.reflect.Advice (OnClassCondition)

       BatchAutoConfiguration
          - required @ConditionalOnClass classes not found: org.springframework.batch.core.launch.JobLauncher,org.springframework.jdbc.core.JdbcOperations (OnClassCondition)

       ElasticsearchRepositoriesAutoConfiguration
          - required @ConditionalOnClass classes not found: org.elasticsearch.client.Client,org.springframework.data.elasticsearch.repository.ElasticsearchRepository (OnClassCondition)

       JpaRepositoriesAutoConfiguration
          - required @ConditionalOnClass classes not found: org.springframework.data.jpa.repository.JpaRepository (OnClassCondition)

       MongoRepositoriesAutoConfiguration
          - required @ConditionalOnClass classes not found: com.mongodb.Mongo,org.springframework.data.mongodb.repository.MongoRepository (OnClassCondition)

       RepositoryRestMvcAutoConfiguration
          - not a web application (OnWebApplicationCondition)

       SolrRepositoriesAutoConfiguration
          - required @ConditionalOnClass classes not found: org.apache.solr.client.solrj.SolrServer,org.springframework.data.solr.repository.SolrRepository (OnClassCondition)

       ElasticsearchAutoConfiguration
          - required @ConditionalOnClass classes not found: org.elasticsearch.client.Client,org.springframework.data.elasticsearch.client.TransportClientFactoryBean,org.springframework.data.elasticsearch.client.NodeClientFactoryBean (OnClassCondition)

       ElasticsearchDataAutoConfiguration
          - required @ConditionalOnClass classes not found: org.elasticsearch.client.Client,org.springframework.data.elasticsearch.core.ElasticsearchTemplate (OnClassCondition)

       FlywayAutoConfiguration
          - required @ConditionalOnClass classes not found: org.flywaydb.core.Flyway (OnClassCondition)

       FreeMarkerAutoConfiguration
          - required @ConditionalOnClass classes not found: freemarker.template.Configuration,org.springframework.ui.freemarker.FreeMarkerConfigurationFactory (OnClassCondition)

       GroovyTemplateAutoConfiguration
          - required @ConditionalOnClass classes not found: groovy.text.TemplateEngine (OnClassCondition)

       HypermediaAutoConfiguration
          - required @ConditionalOnClass classes not found: org.springframework.hateoas.Resource (OnClassCondition)

       IntegrationAutoConfiguration
          - required @ConditionalOnClass classes not found: org.springframework.integration.config.EnableIntegration (OnClassCondition)

       JacksonAutoConfiguration.JodaModuleAutoConfiguration
          - required @ConditionalOnClass classes not found: com.fasterxml.jackson.datatype.joda.JodaModule (OnClassCondition)

       JacksonAutoConfiguration.Jsr310ModuleAutoConfiguration
          - Required JVM version 1.8 or newer found 1.6 (OnJavaCondition)

       DataSourceAutoConfiguration
          - required @ConditionalOnClass classes not found: org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType (OnClassCondition)

       DataSourceTransactionManagerAutoConfiguration
          - required @ConditionalOnClass classes not found: org.springframework.jdbc.core.JdbcTemplate,org.springframework.transaction.PlatformTransactionManager (OnClassCondition)

       JmsAutoConfiguration
          - required @ConditionalOnClass classes not found: org.springframework.jms.core.JmsTemplate (OnClassCondition)

       ActiveMQAutoConfiguration
          - required @ConditionalOnClass classes not found: javax.jms.ConnectionFactory,org.apache.activemq.ActiveMQConnectionFactory (OnClassCondition)

       HornetQAutoConfiguration
          - required @ConditionalOnClass classes not found: javax.jms.ConnectionFactory,org.hornetq.api.jms.HornetQJMSClient (OnClassCondition)

       JmxAutoConfiguration#mbeanExporter
          - @ConditionalOnMissingBean (types: org.springframework.jmx.export.MBeanExporter; SearchStrategy: current) found the following [mbeanExporter] (OnBeanCondition)

       LiquibaseAutoConfiguration
          - required @ConditionalOnClass classes not found: liquibase.integration.spring.SpringLiquibase (OnClassCondition)

       DeviceDelegatingViewResolverAutoConfiguration
          - not a web application (OnWebApplicationCondition)

       DeviceResolverAutoConfiguration
          - required @ConditionalOnClass classes not found: org.springframework.mobile.device.DeviceResolverHandlerInterceptor,org.springframework.mobile.device.DeviceHandlerMethodArgumentResolver (OnClassCondition)

       SitePreferenceAutoConfiguration
          - required @ConditionalOnClass classes not found: org.springframework.mobile.device.site.SitePreferenceHandlerInterceptor,org.springframework.mobile.device.site.SitePreferenceHandlerMethodArgumentResolver (OnClassCondition)

       MongoAutoConfiguration
          - required @ConditionalOnClass classes not found: com.mongodb.Mongo (OnClassCondition)

       MongoDataAutoConfiguration
          - required @ConditionalOnClass classes not found: com.mongodb.Mongo,org.springframework.data.mongodb.core.MongoTemplate (OnClassCondition)

       HibernateJpaAutoConfiguration
          - did not find HibernateEntityManager class (HibernateJpaAutoConfiguration.HibernateEntityManagerCondition)

       ReactorAutoConfiguration
          - required @ConditionalOnClass classes not found: reactor.spring.context.config.EnableReactor (OnClassCondition)

       RedisAutoConfiguration
          - required @ConditionalOnClass classes not found: org.springframework.data.redis.connection.jedis.JedisConnection,org.springframework.data.redis.core.RedisOperations,redis.clients.jedis.Jedis (OnClassCondition)

       FallbackWebSecurityAutoConfiguration
          - SpEL expression on org.springframework.boot.autoconfigure.security.FallbackWebSecurityAutoConfiguration: !${security.basic.enabled:true} (OnExpressionCondition)

       SecurityAutoConfiguration
          - required @ConditionalOnClass classes not found: org.springframework.security.authentication.AuthenticationManager (OnClassCondition)

       FacebookAutoConfiguration
          - required @ConditionalOnClass classes not found: org.springframework.social.facebook.connect.FacebookConnectionFactory (OnClassCondition)

       LinkedInAutoConfiguration
          - required @ConditionalOnClass classes not found: org.springframework.social.linkedin.connect.LinkedInConnectionFactory (OnClassCondition)

       SocialWebAutoConfiguration
          - required @ConditionalOnClass classes not found: org.springframework.social.connect.web.ConnectController,org.springframework.social.config.annotation.SocialConfigurerAdapter (OnClassCondition)

       TwitterAutoConfiguration
          - required @ConditionalOnClass classes not found: org.springframework.social.twitter.connect.TwitterConnectionFactory (OnClassCondition)

       SolrAutoConfiguration
          - required @ConditionalOnClass classes not found: org.apache.solr.client.solrj.SolrServer (OnClassCondition)

       ThymeleafAutoConfiguration
          - required @ConditionalOnClass classes not found: org.thymeleaf.spring4.SpringTemplateEngine (OnClassCondition)

       VelocityAutoConfiguration
          - required @ConditionalOnClass classes not found: org.apache.velocity.app.VelocityEngine,org.springframework.ui.velocity.VelocityEngineFactory (OnClassCondition)

       DispatcherServletAutoConfiguration
          - not a web application (OnWebApplicationCondition)

       EmbeddedServletContainerAutoConfiguration
          - not a web application (OnWebApplicationCondition)

       ErrorMvcAutoConfiguration
          - required @ConditionalOnClass classes not found: javax.servlet.Servlet,org.springframework.web.servlet.DispatcherServlet (OnClassCondition)

       MultipartAutoConfiguration
          - required @ConditionalOnClass classes not found: javax.servlet.Servlet,javax.servlet.MultipartConfigElement (OnClassCondition)

       ServerPropertiesAutoConfiguration
          - not a web application (OnWebApplicationCondition)

       WebMvcAutoConfiguration
          - not a web application (OnWebApplicationCondition)

       WebSocketAutoConfiguration
          - required @ConditionalOnClass classes not found: javax.servlet.Servlet,org.apache.catalina.startup.Tomcat,org.springframework.web.socket.WebSocketHandler,org.apache.tomcat.websocket.server.WsSci (OnClassCondition)



    2014-06-14 19:29:04.348  INFO 986 --- [           main] hello.Application                        : Started Application in 0.73 seconds (JVM running for 1.085)
    2014-06-14 19:29:06.378  INFO 986 --- [       Thread-3] s.c.a.AnnotationConfigApplicationContext : Closing org.springframework.context.annotation.AnnotationConfigApplicationContext@c163956: startup date [Sat Jun 14 19:29:03 BST 2014]; root of context hierarchy
    2014-06-14 19:29:06.379  INFO 986 --- [       Thread-3] o.s.j.e.a.AnnotationMBeanExporter        : Unregistering JMX-exposed beans on shutdown

Answer 1

我也有同样的问题。为了使它工作，我必须调整 pom.xml 并注释掉 spring-boot-starter-tomcat 工件的“提供”范围并更新依赖项。

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

现在它按预期启动了!感谢其他一些让我走上正轨的答案。