execution default of spring-boot-maven-plugin repackage failed

I’ve got a simple project that is doing nothing for now and which is just a simple Spring Boot 2 application which supposed to use java 9.

When I run mvnw clean package over hero-journey folder I get this error

ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.0.0.M5:repackage (default) on project hero-journey-web: Execution default of goal org.springframework.boot:spring-boot-maven-plugin:2.0.0.M5:repackage failed.: RuntimeException ->
 [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.0.0.M5:repackage (default) on project hero-journey-web: Execution default of goal org.springframework.boot:spring-boot-maven-plugin
:2.0.0.M5:repackage failed.
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:213)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:154)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:146)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:117)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81)
        at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
        at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:309)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:194)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:107)
        at org.apache.maven.cli.MavenCli.execute(MavenCli.java:993)
        at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:345)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:191)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:564)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
        at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
        at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:564)
        at org.apache.maven.wrapper.BootstrapMainStarter.start(BootstrapMainStarter.java:39)
        at org.apache.maven.wrapper.WrapperExecutor.execute(WrapperExecutor.java:122)
        at org.apache.maven.wrapper.MavenWrapperMain.main(MavenWrapperMain.java:50)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default of goal org.springframework.boot:spring-boot-maven-plugin:2.0.0.M5:repackage failed.
        at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:145)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
        ... 27 more
Caused by: java.lang.RuntimeException
        at org.springframework.asm.ClassVisitor.visitModule(ClassVisitor.java:148)
        at org.springframework.asm.ClassReader.readModule(ClassReader.java:762)
        at org.springframework.asm.ClassReader.accept(ClassReader.java:663)
        at org.springframework.asm.ClassReader.accept(ClassReader.java:527)
        at org.springframework.boot.loader.tools.MainClassFinder.createClassDescriptor(MainClassFinder.java:267)
        at org.springframework.boot.loader.tools.MainClassFinder.doWithMainClasses(MainClassFinder.java:223)
        at org.springframework.boot.loader.tools.MainClassFinder.findSingleMainClass(MainClassFinder.java:203)
        at org.springframework.boot.loader.tools.Repackager.findMainMethod(Repackager.java:365)
        at org.springframework.boot.loader.tools.Repackager.findMainMethodWithTimeoutWarning(Repackager.java:354)
        at org.springframework.boot.loader.tools.Repackager.buildManifest(Repackager.java:325)
        at org.springframework.boot.loader.tools.Repackager.repackage(Repackager.java:255)
        at org.springframework.boot.loader.tools.Repackager.repackage(Repackager.java:248)
        at org.springframework.boot.loader.tools.Repackager.repackage(Repackager.java:193)
        at org.springframework.boot.maven.RepackageMojo.repackage(RepackageMojo.java:221)
        at org.springframework.boot.maven.RepackageMojo.execute(RepackageMojo.java:208)
        at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
        ... 28 more
[ERROR]
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR]   mvn <goals> -rf :hero-journey-web

It does not provide any particular information about the cause except RuntimeException and that something happen (it seems) on class parsing.

mvn -version looks like this

Apache Maven 3.5.0
Maven home: L:installedapache-maven-3.5.0bin..
Java version: 9, vendor: Oracle Corporation
Java home: C:Program FilesJavajdk-9

What is the problem?

My main pom.xml looks like this

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.lapots.breed.hero.journey</groupId>
    <artifactId>hero-journey</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>pom</packaging>

    <name>hero-journey</name>
    <description>Start the journey towards the greatest powers</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.0.M5</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <modules>
        <module>hero-journey-web</module>
    </modules>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>9</java.version>
    </properties>

    <distributionManagement>
        <repository>
            <id>google-drive-repository</id>
            <url>file://L:/google-drive/m2-artifactory/mvn-releases</url>
        </repository>
        <snapshotRepository>
            <id>google-drive-snapshot</id>
            <url>file://L:/google-drive/m2-artifactory/mvn-snapshots</url>
        </snapshotRepository>
    </distributionManagement>

    <repositories>
        <repository>
            <id>spring-snapshots</id>
            <name>Spring Snapshots</name>
            <url>https://repo.spring.io/snapshot</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>google-drive-releases</id>
            <url>file://L:/google-drive/m2-artifactory/mvn-releases</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>google-drive-snapshots</id>
            <url>file://L:/google-drive/m2-artifactory/mvn-snapshots</url>
            <releases>
                <enabled>false</enabled>
            </releases>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
    </repositories>

    <pluginRepositories>
        <pluginRepository>
            <id>spring-snapshots</id>
            <name>Spring Snapshots</name>
            <url>https://repo.spring.io/snapshot</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </pluginRepository>
        <pluginRepository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </pluginRepository>
    </pluginRepositories>


</project>

My subproject pom.xml looks like this

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <parent>
        <groupId>com.lapots.breed.hero.journey</groupId>
        <artifactId>hero-journey</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>

    <artifactId>hero-journey-web</artifactId>
    <description>Hero Journey - web application</description>
    <packaging>jar</packaging>

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

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

Answer

It seems I ran into existing issue So I used the solution provided by @wilkinsona to resolve it. I added configuration with mainClass and project was successfully built.

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <configuration>
                <mainClass>com.lapots.breed.hero.journey.web.HeroJourneyWebApplication</mainClass>
            </configuration>
        </plugin>
    </plugins>
</build>