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From "Karl Heinz Marbaise (JIRA)" <>
Subject [jira] [Created] (MNG-5868) Adding serval times the same artifact via MavenProjectHelper (attachArtifact) does not produce a failure
Date Sun, 09 Aug 2015 13:18:45 GMT
Karl Heinz Marbaise created MNG-5868:

             Summary: Adding serval times the same artifact via MavenProjectHelper (attachArtifact)
does not produce a failure 
                 Key: MNG-5868
             Project: Maven
          Issue Type: Bug
          Components: core
    Affects Versions: 3.3.3, 3.2.5, 3.1.1, 3.0.5
            Reporter: Karl Heinz Marbaise

During the check of an issue MSHADE-195 i stumbled over several things...

If you take a look here and the log output excerpt:

INFO] Minimized 2341 -> 1293
[INFO] Minimized 3282 -> 2234
[INFO] Replacing original artifact with shaded artifact.
[INFO] Replacing /Users/kama/ws-git/apache/mshade/mshade-195/target/MSHADE-195-example-1-SNAPSHOT.jar
with /Users/kama/ws-git/apache/mshade/mshade-195/target/MSHADE-195-example-1-SNAPSHOT-shaded.jar
[INFO] Replacing original source artifact with shaded source artifact.
[INFO] Replacing /Users/kama/ws-git/apache/mshade/mshade-195/target/MSHADE-195-example-1-SNAPSHOT-sources.jar
with /Users/kama/ws-git/apache/mshade/mshade-195/target/MSHADE-195-example-1-SNAPSHOT-shaded-sources.jar
[INFO] Dependency-reduced POM written at: /Users/kama/ws-git/apache/mshade/mshade-195/dependency-reduced-pom.xml
[INFO] --- maven-install-plugin:2.5.2:install (default-install) @ MSHADE-195-example ---
[INFO] Installing /Users/kama/ws-git/apache/mshade/mshade-195/target/MSHADE-195-example-1-SNAPSHOT.jar
to /Users/kama/.m2/repository/com/example/MSHADE-195-example/1-SNAPSHOT/MSHADE-195-example-1-SNAPSHOT.jar
[INFO] Installing /Users/kama/ws-git/apache/mshade/mshade-195/dependency-reduced-pom.xml to
[INFO] Installing /Users/kama/ws-git/apache/mshade/mshade-195/target/MSHADE-195-example-1-SNAPSHOT-sources.jar
to /Users/kama/.m2/repository/com/example/MSHADE-195-example/1-SNAPSHOT/MSHADE-195-example-1-SNAPSHOT-sources.jar
[INFO] Installing /Users/kama/ws-git/apache/mshade/mshade-195/target/MSHADE-195-example-1-SNAPSHOT-sources.jar
to /Users/kama/.m2/repository/com/example/MSHADE-195-example/1-SNAPSHOT/MSHADE-195-example-1-SNAPSHOT-sources.jar

Install plugin tries to install two identical artifacts which will work for maven-install-plugin
but would fail a deploy to repository manager (for releases) etc.

So after diving into the problem i found the following code in maven-core (

     * Add or replace an artifact. This method is now deprecated. Use the @{MavenProjectHelper}
to attach artifacts to a
     * project. In spite of the 'throws' declaration on this API, this method has never thrown
an exception since Maven
     * 3.0.x. Historically, it logged and ignored a second addition of the same g/a/v/c/t.
Now it replaces the file for
     * the artifact, so that plugins (e.g. shade) can change the pathname of the file for
a particular set of
     * coordinates.
     * @param artifact the artifact to add or replace.
     * @throws DuplicateArtifactAttachmentException
    public void addAttachedArtifact( Artifact artifact )
        throws DuplicateArtifactAttachmentException
        getAttachedArtifacts().add( artifact );

    public List<Artifact> getAttachedArtifacts()
        if ( attachedArtifacts == null )
            attachedArtifacts = new ArrayList<>();
        return attachedArtifacts;
So taking a look into and the implementation (

     * Add an attached artifact or replace the file for an existing artifact.
     * @see MavenProject#addAttachedArtifact(org.apache.maven.artifact.Artifact)
     * @param project project reference.
     * @param artifact artifact to add or replace.
    public void attachArtifact( MavenProject project, Artifact artifact )
        project.addAttachedArtifact( artifact );

which means that there is not check if an artifacts is already attached.

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