Maven default compile not picking up custom plugin goal - maven-plugin

Question

I have written a custom plugin, then I installed it. Then I modified the pom.xml of the project from which I want to use the custom plugin. When I invoke my plugin goal directly the plugin goal is executed successfully, but when I try to mvn compile my custom plugin goal is not executed. What might be the reason?
My plugin's pom.xml:
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.xxx.plugins.maven</groupId>
<artifactId>datanucleus-enhance-maven-plugin</artifactId>
<packaging>maven-plugin</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>Datanucleus-enhance Maven Plugin</name>
<dependencies>
<dependency>
<groupId>org.apache.maven.plugin-tools</groupId>
<artifactId>maven-plugin-annotations</artifactId>
<version>3.2</version>
</dependency>
<dependency>
<groupId>org.apache.maven</groupId>
<artifactId>maven-plugin-api</artifactId>
<version>2.0</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
My project using custom plugin I added following:
<!-- enhance JDO classes -->
<plugin>
<groupId>com.sukantu.plugins.maven</groupId>
<artifactId>datanucleus-enhance-maven-plugin</artifactId>
<version>0.0.1-SNAPSHOT</version>
<configuration>
<jdoClassDirList>
<param>target/${project.artifactId}-${project.version}/WEB-INF/classes/</param>
</jdoClassDirList>
</configuration>
<executions>
<execution>
<phase>compile</phase>
<goals>
<goal>enhance</goal>
</goals>
</execution>
</executions>
</plugin>
I followed section Attaching the Mojo to the Build Lifecycle from maven guide site: https://maven.apache.org/guides/plugin/guide-java-plugin-development.html
The following command successfully calls my plugin goal:
mvn com.xxx.plugins.maven:datanucleus-enhance-maven-plugin:enhance
The following command does NOT successfully call my plugin goal:
mvn compile
Thanks for any inputs!

Answer 1

I came across this link:
How do I link a plugin execution to a phase in maven without forcing me to specify plugin on command line
So I removed <pluginManagement> tags so <plugins> appear directly under '<build>'. Then I tried 'mvn compile' from command line and it successfully called my custom plugin goal!
But when I checked pom.xml in Eclipse I saw another error referenced here How to solve “Plugin execution not covered by lifecycle configuration” .
Since the command line is working correctly, I think this is m2e Eclipse plugin error and so I have disabled the marked by going to 'Eclipse' -> 'Window' -> 'Show View' -> 'Markers' -> right click that marker -> 'Delete'. Now Eclipse is not showing any error and command line is also working as expected. Hope this helps someone else.