Spring boot maven plugin class not found

I have three maven project one is pom package and other 2 are jar packaging here is the admin-aggreagator pom

<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.sounds.bvs</groupId>
    <artifactId>admin-aggregator</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>pom</packaging>


    <modules>
        <module>../admin-lib</module>
        <module>../admin-rest</module>
    </modules>


    <properties>
        <project.build.SourceEncoding>UTF-8</project.build.SourceEncoding>
        <spring-boot-version>2.0.4.RELEASE</spring-boot-version>
        <spring-version>2.0.4.RELEASE</spring-version>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
        <start-class>com.sounds.bvs.AdminRestApp</start-class>
    </properties>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.4.RELEASE</version>
    </parent>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>com.sounds.bvs</groupId>
                <artifactId>admin-lib</artifactId>
                <version>${project.version}</version>
            </dependency>
            <dependency>
                <groupId>com.sounds.bvs</groupId>
                <artifactId>admin-rest</artifactId>
                <version>${project.version}</version>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                        <configuration>
                            <classifier>exec</classifier>
                            <mainClass>${start-class}</mainClass>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven.compiler.plugin</artifactId>
                <version>3.8.0</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <showDeprication>true</showDeprication>
                    <showWarnings>true</showWarnings>
                </configuration>
            </plugin>
        </plugins>
    </build>

    <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>
    </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>

And the admin-rest pom.xml and its Main class i’m not getting as what i’m missing as the ctrl-click is navigating to respective project and type search is able to find the main class in admin-rest project ctrl+shift+T is also getting still it is showing same,

<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.sounds.bvs</groupId>
        <artifactId>admin-aggregator</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <artifactId>admin-rest</artifactId>

    <dependencies>
        <dependency>
            <groupId>com.sounds.bvs</groupId>
            <artifactId>admin-lib</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
        <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>
        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-jetty -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jetty</artifactId>
        </dependency>


    </dependencies>
</project>

The Main Class AdminRestApp.java and i’m trying to run the admin-aggregator with

mvn clean spring-boot:run
mvnw.cmd clean spring-boot:run
./mvnw spring-boot:run 

but none are working

package com.sounds.bvs;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class AdminRestApp {

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



and the exception i see class not found exception i tried all which were from similar topic none helped, the start-class tag is also place and hard code the full path com.sounds.bvs.AdminRestApp in mainClass still that also did not help,

i have tried changing spring boot version as well as maven compiler plugin version that also dint helped please help is need very badly.

earlier the package path was large com.sounds.bvs.admin.rest that time also same issue changed the package name also dint helped

please let me know what i’m missing thanks in advance.

[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Build Order:
[INFO] `enter code here`
[INFO] admin-aggregator
[INFO] admin-lib
[INFO] admin-rest
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building admin-aggregator 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-clean-plugin:3.0.0:clean (default-clean) @ admin-aggregator ---
[INFO] 
[INFO] >>> spring-boot-maven-plugin:2.0.4.RELEASE:run (default-cli) > test-compile @ admin-aggregator >>>
[INFO] 
[INFO] <<< spring-boot-maven-plugin:2.0.4.RELEASE:run (default-cli) < test-compile @ admin-aggregator <<<
[INFO] 
[INFO] --- spring-boot-maven-plugin:2.0.4.RELEASE:run (default-cli) @ admin-aggregator ---
[WARNING] 
java.lang.ClassNotFoundException: com.sounds.bvs.AdminRestApp
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run(AbstractRunMojo.java:491)
    at java.lang.Thread.run(Thread.java:745)
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO] 
[INFO] admin-aggregator ................................... FAILURE [ 42.358 s]
[INFO] admin-lib .......................................... SKIPPED
[INFO] admin-rest ......................................... SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 56.280 s
[INFO] Finished at: 2018-08-10T00:43:37+05:30
[INFO] Final Memory: 17M/111M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.0.4.RELEASE:run (default-cli) on project admin-aggregator: An exception occurred while running. com.sounds.bvs.AdminRestApp -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[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/MojoExecutionException

Answer

Adding a spring boot version solved my problem.

    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <version>2.4.1</version>
        </plugin>
    </plugins>

replace with your version of spring boot in Maven Tab ->plugins

Attribution
Source : Link , Question Author : Vikram , Answer Author : Bharat Kathuria

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