Why can't I clean my tycho project with maven clean?

Question

I'm facing below issue, is there any hint to help me out? Thanks.

I have a project set up as below:

C:\workspace
 |-------com.myorg.myplugin.tycho
 |-------com.myorg.myplugin1
 |-------com.myorg.myplugin2
 |-------com.myorg.myplugin.feature
 |-------com.myorg.mylpugin.repository

com.myorg.myplugin2 is a plug-in project, and it is a dependency of the com.myorg.myplugin1 plug-in project. Both of the project are included as module in the tycho parent project.

I'm able to run maven clean package successfully in tycho project. But when I try to run only maven clean , following error occurs:

org.apache.maven.project.DependencyResolutionException: Could not resolve dependencies for project mygroup:com.myorg.myplugin1:eclipse-plugin:1.0.0-SNAPSHOT: Could not find artifact mygroup:com.myorg.myplugin2:jar:1.0.0-SNAPSHOT

--> why is it looking for a jar artifact???

The pom.xml files of two plug-in projects are very simple:

<?xml version="1.0" encoding="UTF-8"?>
<project
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
    xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>mygroup</groupId>
        <artifactId>com.myorg.myplugin.tycho</artifactId>
        <version>1.0.0-SNAPSHOT</version>
        <relativePath>../com.myorg.myplugin.tycho/</relativePath>
    </parent>
    <groupId>mygroup</groupId>
    <artifactId>com.myorg.myplugin1</artifactId>
    <packaging>eclipse-plugin</packaging>
</project>

and

<?xml version="1.0" encoding="UTF-8"?>
<project
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
    xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>mygroup</groupId>
        <artifactId>com.myorg.myplugin.tycho</artifactId>
        <version>1.0.0-SNAPSHOT</version>
        <relativePath>../com.myorg.myplugin.tycho/</relativePath>
    </parent>
    <groupId>mygroup</groupId>
    <artifactId>com.myorg.myplugin2</artifactId>
    <packaging>eclipse-plugin</packaging>
</project>

Answer 1

I'm finally able to solve this with the help of some colleagues. This happened because I've never run install goal before. Once I did it, clean works as normal. I'm not sure why, but it works :)