Spring Boot: Unable to start EmbeddedWebApplicationContext due to missing EmbeddedServletContainerFactory bean

问题:

I am totally new to Spring and started to do the official guides from this site: https://spring.io/guides

I'd like to do this guide: https://spring.io/guides/gs/scheduling-tasks/

I get the following Exception:

2014-02-14 16:25:21.614  INFO 9032 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.scheduling.annotation.SchedulingConfiguration' of type [class org.springframework.scheduling.annotation.SchedulingConfiguration$$EnhancerByCGLIB$$5b48d763] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 2014-02-14 16:25:21.638  INFO 9032 --- [           main] .c.l.ClasspathLoggingApplicationListener : Application failed to start with classpath: [file:/C:/work/Spring/SpringTutorial/target/classes/, file:/C:/work/apache-maven-3.0.3/repo/javax/servlet/javax.servlet-api/3.0.1/javax.servlet-api-3.0.1.jar, file:/C:/work/apache-maven-3.0.3/repo/org/springframework/boot/spring-boot-starter/1.0.0.RC1/spring-boot-starter-1.0.0.RC1.jar, file:/C:/work/apache-maven-3.0.3/repo/org/springframework/boot/spring-boot/1.0.0.RC1/spring-boot-1.0.0.RC1.jar, file:/C:/work/apache-maven-3.0.3/repo/org/springframework/spring-core/4.0.0.RELEASE/spring-core-4.0.0.RELEASE.jar, file:/C:/work/apache-maven-3.0.3/repo/org/springframework/spring-context/4.0.0.RELEASE/spring-context-4.0.0.RELEASE.jar, file:/C:/work/apache-maven-3.0.3/repo/org/springframework/boot/spring-boot-autoconfigure/1.0.0.RC1/spring-boot-autoconfigure-1.0.0.RC1.jar, file:/C:/work/apache-maven-3.0.3/repo/org/springframework/boot/spring-boot-starter-logging/1.0.0.RC1/spring-boot-starter-logging-1.0.0.RC1.jar, file:/C:/work/apache-maven-3.0.3/repo/org/slf4j/jcl-over-slf4j/1.7.5/jcl-over-slf4j-1.7.5.jar, file:/C:/work/apache-maven-3.0.3/repo/org/slf4j/slf4j-api/1.7.5/slf4j-api-1.7.5.jar, file:/C:/work/apache-maven-3.0.3/repo/org/slf4j/jul-to-slf4j/1.7.5/jul-to-slf4j-1.7.5.jar, file:/C:/work/apache-maven-3.0.3/repo/org/slf4j/log4j-over-slf4j/1.7.5/log4j-over-slf4j-1.7.5.jar, file:/C:/work/apache-maven-3.0.3/repo/ch/qos/logback/logback-classic/1.0.13/logback-classic-1.0.13.jar, file:/C:/work/apache-maven-3.0.3/repo/ch/qos/logback/logback-core/1.0.13/logback-core-1.0.13.jar, file:/C:/work/apache-maven-3.0.3/repo/org/springframework/boot/spring-boot-starter-web/1.0.0.RC1/spring-boot-starter-web-1.0.0.RC1.jar, file:/C:/work/apache-maven-3.0.3/repo/org/springframework/boot/spring-boot-starter-tomcat/1.0.0.RC1/spring-boot-starter-tomcat-1.0.0.RC1.jar, file:/C:/work/apache-maven-3.0.3/repo/org/apache/tomcat/embed/tomcat-embed-core/7.0.47/tomcat-embed-core-7.0.47.jar, file:/C:/work/apache-maven-3.0.3/repo/org/apache/tomcat/embed/tomcat-embed-logging-juli/7.0.47/tomcat-embed-logging-juli-7.0.47.jar, file:/C:/work/apache-maven-3.0.3/repo/org/springframework/spring-web/4.0.0.RELEASE/spring-web-4.0.0.RELEASE.jar, file:/C:/work/apache-maven-3.0.3/repo/aopalliance/aopalliance/1.0/aopalliance-1.0.jar, file:/C:/work/apache-maven-3.0.3/repo/org/springframework/spring-aop/4.0.0.RELEASE/spring-aop-4.0.0.RELEASE.jar, file:/C:/work/apache-maven-3.0.3/repo/org/springframework/spring-beans/4.0.0.RELEASE/spring-beans-4.0.0.RELEASE.jar, file:/C:/work/apache-maven-3.0.3/repo/org/springframework/spring-webmvc/4.0.0.RELEASE/spring-webmvc-4.0.0.RELEASE.jar, file:/C:/work/apache-maven-3.0.3/repo/org/springframework/spring-expression/4.0.0.RELEASE/spring-expression-4.0.0.RELEASE.jar, file:/C:/work/apache-maven-3.0.3/repo/com/fasterxml/jackson/core/jackson-databind/2.3.1/jackson-databind-2.3.1.jar, file:/C:/work/apache-maven-3.0.3/repo/com/fasterxml/jackson/core/jackson-annotations/2.3.0/jackson-annotations-2.3.0.jar, file:/C:/work/apache-maven-3.0.3/repo/com/fasterxml/jackson/core/jackson-core/2.3.1/jackson-core-2.3.1.jar, file:/C:/work/apache-maven-3.0.3/repo/commons-lang/commons-lang/2.2/commons-lang-2.2.jar] Exception in thread "main" org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is org.springframework.context.ApplicationContextException: Unable to start EmbeddedWebApplicationContext due to missing EmbeddedServletContainerFactory bean.     at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:140)     at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:476)     at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:124)     at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:658)     at org.springframework.boot.SpringApplication.run(SpringApplication.java:355)     at org.springframework.boot.SpringApplication.run(SpringApplication.java:920)     at org.springframework.boot.SpringApplication.run(SpringApplication.java:909)     at hu.kumite.Application.main(Application.java:17) Caused by: org.springframework.context.ApplicationContextException: Unable to start EmbeddedWebApplicationContext due to missing EmbeddedServletContainerFactory bean.     at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.getEmbeddedServletContainerFactory(EmbeddedWebApplicationContext.java:190)     at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.createEmbeddedServletContainer(EmbeddedWebApplicationContext.java:163)     at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:137)     ... 7 more 

The application starter class is this:

@ComponentScan @EnableAutoConfiguration public class Application {     public static void main(String[] args) {     //SpringApplication.run(Application.class, args);     SpringApplication.run(ScheduledTasks.class, args);     } } 

As you can see, the main method contains a commented line. I've already done a tutorial, namely this one: https://spring.io/guides/gs/consuming-rest/ It's up and running. But I can't run the ScheduledTasks app, which is the following:

@EnableScheduling public class ScheduledTasks {      private static final SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm:ss");      @Scheduled(fixedRate = 5000)     public void reportCurrentTime() {         System.out.println("The time is now " + dateFormat.format(new Date()));     } } 

I use Eclipse and run the Application.java's main as an Application. Could someone please help me?

回答1:

The scheduling guide isn't a web app so you probably have some mouldy stuff in your pom.xml from the REST guide? If you follow the instructions closely it should work. Another potential issue with the code you posted above is that your @EnableAutoConfiguration class is not used in the context, only as a main method (which may not be a problem for the scheduling guide but it probably is for a bunch of others).

回答2:

A scan of the @SpringBootApplication show that it includes the following annotations:

@Configuration @ComponentScan @EnableAutoConfiguration 

So you could do this too:

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

回答3:

use this one in your pom.xml :

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

or this one :

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

回答4:

Try this

@Configuration @ComponentScan @EnableAutoConfiguration public class Application {     public static void main(String[] args) {        SpringApplication.run(ScheduledTasks.class, args);     } } 

回答5:

I had multiple application classes in one Spring Boot project which had the web started included and wanted to avoid it configuring a web environment for one of them so I manually configured it as below:

@SpringBootApplication public class Application {     public static void main(String[] args)     {         new SpringApplicationBuilder(Application.class).web(false).run(args);     } } 

回答6:

The error suggests that the application you are trying to run cannot instantiate an instance of apache tomcat. Make sure you are running the application with tomcat.

if after checking all your dependencies you experience the same problem, try to add the following in your configuration class

    @Bean     public EmbeddedServletContainerFactory servletContainer() {         TomcatEmbeddedServletContainerFactory factory =                        new TomcatEmbeddedServletContainerFactory();         return factory;      } 

If you are using an external instance of tomcat (especially for intelij), the problem could be that the IDE is trying to start the embedded tomcat. In this case, remove the following from your pom.xml then configure the external tomcat using the 'Edit Configurations' wizard.

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

回答7:

Add

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

回答8:

if you experience this exception while using intellij and you are trying to start the application with the run button. Try starting the application from the command line instead. E.g. ensure that you are in the correct directory (directory with your pom file) assuming this is a springboot application run mvn spring-boot:run this did the trick for me.

Additionally I have also seen this error occur when your spring application depends on another application. In this case I had to start the other application first then run.

回答9:

I've had similar problems when the main method is on a different class than that passed to SpringApplcation.run()

So the solution would be to use the line you've commented out:

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

回答10:

If you run it successfully using command line gradle bootRun, while packaging it with command line gradle jar to jar file in order to run it with command line java -jar build/libs/demo.jar, unfortunately, it failed with Exception: Unable to start EmbeddedWebApplicationContext due to missing EmbeddedServletContainerFactory bean, in this case, you need to use task bootRepackage of gradle plugin spring-boot to generate special runnable jar.

• setup 1

  $ gradle clean bootRepackage

• setup 2

  $ java -jar build/libs/demo.jar

回答11:

If you package it as a single jar and it's non web app try to load app context as below.

@SpringBootApplication  ApplicationContext ctx = new AnnotationConfigApplicationContext(Main.class); 

Or use below plugin to package as a single jar

             <plugin>                 <groupId>org.springframework.boot</groupId>                 <artifactId>spring-boot-maven-plugin</artifactId>                 <executions>                     <execution>                         <goals>                             <goal>repackage</goal>                         </goals>                     </execution>                 </executions>             </plugin> 

you can specify the external configs by using below command to run

java -jar myproject.jar --spring.config.location=classpath:/default.properties,classpath:/override.properties 

/http://docs.spring.io/spring-boot/docs/current/reference/htmlboot-features-external-config.html#boot-features-external-config-application-property-files

Note that if you are passing the properties as arguments then don't include @PropertySource("classpath:test.properties") it will override the parameters

回答12:

Adding the annotation @SpringBootApplication Before the starter class fixed this problem for me.

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

回答13:

Adding the spring boot starter dependency fixed my error.

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

This is required if you want to start the tomcat as an embeded server.

回答14:

check your pom.xml is exists

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

I've had a problem like this；For lack this dependency

回答15:

A SpringApplication will attempt to create the right type of ApplicationContext on your behalf. By default, an AnnotationConfigApplicationContext or AnnotationConfigEmbeddedWebApplicationContext will be used, depending on whether you are developing a web application or not.

The algorithm used to determine a ‘web environment’ is fairly simplistic (based on the presence of a few classes). You can use setWebEnvironment(boolean webEnvironment) if you need to override the default.

It is also possible to take complete control of the ApplicationContext type that will be used by calling .

[Tip] It is often desirable to call setWebEnvironment(false) when using SpringApplication within a JUnit test.

回答16:

This should be caused by dependency issue, in general, you need to check the dependency.

回答17:

Clear repository is one possible solution.

Windows -> delete all subfolders in the maven repository:

C:\Users\YourUserName.m2\repository

回答18:

In my case we added the @Profile annotation newly in order to ignore the TestApplication class in production mode and the Application class in test mode.

Unfortunately, we forgot to add the following line into the application.properties files:

spring.profiles.active=test or spring.profiles.active=production 

Without these config no profile was loaded which caused the not-so-much saying Spring Error.

回答19:

The problem it's in this class:

@ComponentScan @EnableAutoConfiguration public class Application {     public static void main(String[] args) {     //SpringApplication.run(Application.class, args);     SpringApplication.run(ScheduledTasks.class, args);     } } 

The correct way to launch your application is:

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

回答20:

Problem is exclusion of starter tomcat, I tried exclude it and use vert.x, so when I integrate wit Spring Admin, started problems

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

回答21:

I had this Exception in the following situation.

in my POM was properties:

<properties>     <java.version>1.8</java.version>     <!-- The main class to start by executing java -jar -->     <start-class>com.scmaer.java.microservice.Application</start-class>     <cxf.version>3.1.5</cxf.version>     <olingo.version>2.0.10</olingo.version>     <spring.boot.version>1.4.7.RELEASE</spring.boot.version>     <spring.boot.plugin.version>1.5.8.RELEASE</spring.boot.plugin.version>     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>     <skipTests>false</skipTests> </properties> 

and the name and path of my application class ("start-class") was wrong.

回答22:

I have stuck with same problem. As I didn't define Main.class and the following annotations in Spring-Boot using Maven:

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

回答23:

I had a similar issue and the problem was a broken maven repo jar file. In my case, the tomcat-embed-core jar file was broken. So I removed it from the maven repo and refreshed it to download again.

文章来源: Spring Boot: Unable to start EmbeddedWebApplicationContext due to missing EmbeddedServletContainerFactory bean