Spring Boot 2.1.0 with Jersey

Question

Today i started a simple application spring boot application. Because i am starting from the scratch, i am using the latest version of SpringBoot: 2.1.0.RELEASE

I would like to use Jersey to use JAX-RS. I have this working for 1.3.6 Spring Boot version, but I am getting the following error:

***************************
APPLICATION FAILED TO START
***************************

Description:

The bean 'requestContextFilter', defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter.class], could not be registered. A bean with that name has already been defined in class path resource [org/springframework/boot/autoconfigure/jersey/JerseyAutoConfiguration.class] and overriding is disabled.

Action:

Consider renaming one of the beans or enabling overriding by setting spring.main.allow-bean-definition-overriding=true

I can't understand where the problem could be because my application at this point is minimalist.

Apparently the bean 'requestContextFilter' is being configured twice but i have no idea where it is configured.

Here is my configuration:

pom.xml

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.1.0.RELEASE</version>
</parent>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <start-class>pt.msoftware.userauthservice.App</start-class>
    <java.version>1.8</java.version>
    <docker.image.prefix>${user.name}</docker.image.prefix>
</properties>

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

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

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

        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-jersey</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <optional>true</optional>
    </dependency>
</dependencies>

SpringBoot application class

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

** Jersey Config**

import org.glassfish.jersey.server.ResourceConfig;
import org.springframework.stereotype.Component;
import pt.msoftware.userauthservice.rest.UserEndpoint;

import javax.ws.rs.ApplicationPath;

/**
 * Created by marco on 31/10/2018.
 */
@Component
@ApplicationPath("/rest")
public class JerseyConfig extends ResourceConfig {

    public JerseyConfig() {
        register(UserEndpoint.class);
    }

}

** Endpoint**

import org.springframework.stereotype.Component;

import javax.ws.rs.GET;
import javax.ws.rs.Path;

/**
 * Created by marco on 31/10/2018.
 */
@Component
@Path("/user")
public class UserEndpoint {
    @GET
    public String message() {
        return "Hello";
    }
}

Can someone spot what I am missing or what might be wrong with my code/config?

Thank you so much

Answer 1

It's a bug in Spring Boot. Thanks for bringing it to our attention. I've opened this issue to track the problem.

If you intend to only use Jersey and JAX-RS, you do not need to use spring-boot-starter-web. It's, essentially, a Spring MVC-based equivalent of spring-boot-starter-jersey. You can, therefore, avoid the problem you're seeing by removing the spring-boot-starter-web dependency from your application.

If you do want to use both Spring MVC and JAX-RS, you can enable bean definition overriding by adding spring.main.allow-bean-definition-overriding=true to your application.properties file in src/main/resources.