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

Question

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/sch

Answer 1

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);
    }
}

Answer 2

An other cause of this problem is corruption of maven repository jars so you can use the following command to solve the problem :

mvn dependency:purge-local-repository

Answer 3

Clear repository is one possible solution.

Windows -> delete all subfolders in the maven repository:

C:\Users\YourUserName.m2\repository

Answer 4

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

Answer 5

Try this

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

Answer 6

Adding the annotation @SpringBootApplication Before the starter class fixed this problem for me (so in essence, this error message can mean "you don't have a @SpringBootApplication marked class anywhere, you need at least one)

@SpringBootApplication
public class AppStarter {

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