spring-boot-maven-plugin doesn't create fat jar

Question

I'm using spring-boot-maven-plugin to package my REST service. I'm building the jar using mvn clean install or mvn clean package. After I decompile the jar, I don't find any of the dependencies added (I was expecting it to be a fat jar with all dependencies)

 <plugin>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
    <version>1.5.9.RELEASE</version>
    <executions>
        <execution>
           <phase>install</phase>
           <goals>
              <goal>repackage</goal>
              <goal>build-info</goal>
           </goals>
        </execution>
    </executions>
    <configuration>
        <executable>true</executable>
        <finalName>myapp</finalName>
        <includeSystemScope>true</includeSystemScope>
    </configuration>
</plugin>

When I run the spring boot using java -jar myapp.jar -Drun.jvmArguments="-Dspring.profiles.active=qal" I'm getting ClassNotFoundException for many of the classes. It's clear that artifact didn't build as expected. However, if I start spring boot application using maven ./mvnw spring-boot:run -Drun.jvmArguments="-Dspring.profiles.active=qal" I guess, it finds all the dependencies in target folder hence works fine. How can I fix the build issue so that I can start app using java -jar command.

EDIT: It's multi-module maven project

Answer 1

it seems you are using a wrong command. mvn clean package is maven command, you should use command 'repackage', it used for

Repackages existing JAR and WAR archives so that they can be executed from the command line using java -jar

as it mentioned here https://docs.spring.io/spring-boot/docs/current/maven-plugin/repackage-mojo.html

Or probably it's plugin configuration issue. Just checked: it works with spring-boot-maven-plugin-2.0.0.RELEASE

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