no main manifest attribute maven build even after adding class path and main class

Question

I am facing a error while running application jar no main manifest attribute, in jaspr2-0.0.1-SNAPSHOT.jar.

In all the answers I find that add class path and main class should be mentioned. In my POM i have mentioned both. After the build I find Manifest file is not appended with main class and also Boot/INF is not added in the jar. Looking for a solution to build proper jar. Below is my POM.xml

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.4.RELEASE</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.abn</groupId>
    <artifactId>jaspr2</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>jaspr2</name>
    <description>Project for jcl validation</description>

    <properties>
        <java.version>1.8</java.version>
        <antlr.version>4.8-1</antlr.version>
        <targetDirectory>target</targetDirectory>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</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>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.kie</groupId>
            <artifactId>kie-api</artifactId>
            <version>7.0.0.Final</version>
        </dependency>
        <dependency>
            <groupId>org.drools</groupId>
            <artifactId>drools-core</artifactId>
            <version>7.0.0.Final</version>
        </dependency>
        <dependency>
            <groupId>org.drools</groupId>
            <artifactId>drools-decisiontables</artifactId>
            <version>7.0.0.Final</version>
        </dependency>
        <dependency>
            <groupId>org.antlr</groupId>
            <artifactId>antlr4-runtime</artifactId>
            <version>${antlr.version}</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.antlr/antlr4-maven-plugin -->
        <dependency>
            <groupId>org.antlr</groupId>
            <artifactId>antlr4-maven-plugin</artifactId>
            <version>${antlr.version}</version>
        </dependency>
        <dependency>
            <groupId>org.antlr</groupId>
            <artifactId>antlr4</artifactId>
            <version>${antlr.version}</version>
        </dependency>
        <dependency>
            <groupId>org.antlr</groupId>
            <artifactId>antlr4-master</artifactId>
            <version>${antlr.version}</version>
            <type>pom</type>
        </dependency>
    </dependencies>
    <build>
        <!-- <finalName>jaspr-application</finalName> -->
        <pluginManagement>
            <plugins>
                <plugin>
                    <groupId>org.antlr</groupId>
                    <artifactId>antlr4-maven-plugin</artifactId>
                    <version>${antlr.version}</version>
                    <configuration>
                        <sourceDirectory>${basedir}/src</sourceDirectory>
                    </configuration>
                    <executions>
                        <execution>
                            <goals>
                                <goal>antlr4</goal>
                            </goals>
                        </execution>
                    </executions>
                </plugin>
                <plugin>
                    <groupId>org.codehaus.mojo</groupId>
                    <artifactId>build-helper-maven-plugin</artifactId>
                    <version>${mojo.version}</version>
                    <executions>
                        <execution>
                            <phase>generate-sources</phase>
                            <goals>
                                <goal>add-source</goal>
                            </goals>
                            <configuration>
                                <sources>
                                    <source>${basedir}/src/main/java/com/abn/jaspr/antlr/generated</source>
                                </sources>
                            </configuration>
                        </execution>
                    </executions>
                </plugin>

                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                    <configuration>
                        <mainClass>com.abn.jaspr.Jaspr2Application</mainClass>
                    </configuration>
                    <executions>
                        <execution>
                            <goals>
                                <goal>repackage</goal>
                            </goals>
                        </execution>
                    </executions>
                </plugin>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.8.1</version>
                    <configuration>
                        <jvmArguments>-Dfile.encoding=UTF8</jvmArguments>
                        <source>1.8</source>
                        <target>1.8</target>
                        <archive>
                            <manifest>
                                <addClasspath>true</addClasspath>
                            </manifest>
                        </archive>
                    </configuration>
                </plugin>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-surefire-plugin</artifactId>
                    <configuration>
                        <skipTests>true</skipTests>
                    </configuration>
                </plugin>
            </plugins>
        </pluginManagement>
    </build>

</project>

Answer 1

Since spring-boot-maven-plugin inside the plugin management it was not executing and adding spring boot INF folder. Just moved spring-boot-maven-plugin outside plugin management tag and it resolves the issue.

Find more details in this answer from other question Spring Boot Maven Plugin not creating executable jar