[MNG-5125] Regression: mvn 3.0.3 is extreemly slow with a large number of dependencies

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.3
• Fix Version/s: 3.0.4
• Component/s: Artifacts and Repositories, Inheritance and Interpolation, Performance
• Environment: Java: 1.6.0_24-b07; Maven: 3.0.3; RHEL6: 2.6.32-131.2.1.el6.x86_64
• Assignee: Olivier Lamy
• Reporter: Patrick Staton
• Created: 28/Jun/11 11:57
• Updated: 05/Apr/15 22:54
• Resolved: 30/Jul/12 15:15

Description

I am pretty sure that AETHER-82 / rev a537899308f3d22df5509e33628a0012ba912293 has caused maven 3.0.3 to be extremely slow in our build.

Profiling shows that when we build one of our projects with many dependencies, org.sonatype.aether.impl.internal.DefaultDependencyCollector.process is being called >50000 times in maven 3.0.3 whereas it is called 335 times in maven 3.0.2.

Attached is the html output from a netbeans profiling session of the same build with maven 3.0.2 and maven 3.0.3. I stopped the maven 3.0.3 build after ~5 mins of being stuck at the "[INFO] Building many-deps-project 1.2.3.4-SNAPSHOT" step.

A 'mvn dependency:tree' is identical between the two except that it takes about 10 mins to run in 3.0.3. I have attached the output. If you need me to do a better job censoring the output, ie make the project names unique, let me know.

"webapp-jar" type dependencies are a custom artifact handler:

    <component>
      <role>org.apache.maven.artifact.handler.ArtifactHandler</role>
      <role-hint>webapp-jar</role-hint>
      <implementation>org.apache.maven.artifact.handler.DefaultArtifactHandler</implementation>
      <configuration>
        <classifier>webapp</classifier>
        <type>webapp-jar</type>
        <extension>jar</extension>
        <language>java</language>
        <addedToClasspath>false</addedToClasspath>
      </configuration>
    </component>

We have "java-source" dependencies because we use GWT.

I cannot send you the actual pom files.

Issue Links

• is related to: MDEP-404 mvn 3.0.4 is extreemly slow with a large number of "import" dependencies.