extensions in extensions.xml cause m2e not to update project in Eclipse

[laurentgo]

Observed on Eclipse 4.26/m2e 2.2.1 on MacOS (but this issue has been present for several Eclipse/M2E releases)

I work on a project which has a .mvn/extensions.xml configuration file and is causing Eclipse to fail importing and/or updating the project with the following error message:

Could not lookup required component
com.google.inject.ProvisionException: Unable to provision, see the following errors:

1) Error injecting: public void org.apache.maven.eventspy.internal.EventSpyDispatcher.setEventSpies(java.util.List)
  at ClassRealm[maven.ext., parent: ClassRealm[plexus.core, parent: null]] (via modules: org.eclipse.sisu.wire.WireModule -> org.eclipse.sisu.plexus.PlexusBindingModule)
  while locating org.apache.maven.eventspy.internal.EventSpyDispatcher
    for field at org.apache.maven.internal.aether.DefaultRepositorySystemSessionFactory.eventSpyDispatcher(Unknown Source)
  while locating org.apache.maven.internal.aether.DefaultRepositorySystemSessionFactory
  while locating org.apache.maven.DefaultMaven
  at ClassRealm[maven.ext., parent: ClassRealm[plexus.core, parent: null]] (via modules: org.eclipse.sisu.wire.WireModule -> org.eclipse.sisu.plexus.PlexusBindingModule)
  while locating org.apache.maven.Maven

1 error
      role: org.apache.maven.Maven
  roleHint: 

If I comment the content of the file or remove it, Eclipse has no problem importing the project.

Attaching a small test project to reproduce the issue: m2e-lifecycle-issue.tar.gz

[HannesWell]

Can you please check if the problem still occurs with the latest snapshot:
https://download.eclipse.org/technology/m2e/snapshots/2.6.0/

[laurentgo]

So far it seems to be working but I'm hitting a different issue (#1605)

[theit]

Hm, doesn't seem to be working correctly, at least on my machine:

I have a multi-module project which has a .mvn folder containing the following extensions:

<?xml version="1.0" encoding="UTF-8"?>
<extensions xmlns="http://maven.apache.org/EXTENSIONS/1.1.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/EXTENSIONS/1.1.0 https://maven.apache.org/xsd/core-extensions-1.1.0.xsd">
    <extension>
        <groupId>me.qoomon</groupId>
        <artifactId>maven-git-versioning-extension</artifactId>
        <version>9.10.0</version>
    </extension>
    <extension>
        <groupId>org.apache.maven.extensions</groupId>
        <artifactId>maven-build-cache-extension</artifactId>
        <version>1.2.0</version>
    </extension>
</extensions>

I tried to update a module and the following error occurred (different than the one from the original post, but similar to the NPE in #1605):

!ENTRY org.eclipse.core.resources 4 75 2024-12-09 10:08:47.461
!MESSAGE Errors occurred during the build.
!SUBENTRY 1 org.eclipse.m2e.core 4 75 2024-12-09 10:08:47.461
!MESSAGE Errors running builder 'Maven Project Builder' on project '....'.
!STACK 0
java.lang.NullPointerException: Cannot invoke "org.apache.maven.model.InputLocation.getSource()" because the return value of "org.apache.maven.model.Model.getLocation(Object)" is null
        at org.eclipse.m2e.core.internal.lifecyclemapping.AnnotationMappingMetadataSource.parsePIs(AnnotationMappingMetadataSource.java:174)
        at org.eclipse.m2e.core.internal.lifecyclemapping.AnnotationMappingMetadataSource.get(AnnotationMappingMetadataSource.java:72)
        at org.eclipse.m2e.core.internal.lifecyclemapping.LifecycleMappingFactory.getPomMappingMetadataSources(LifecycleMappingFactory.java:872)
        at org.eclipse.m2e.core.internal.lifecyclemapping.LifecycleMappingFactory.getProjectMetadataSourcesMap(LifecycleMappingFactory.java:277)
        at org.eclipse.m2e.core.internal.lifecyclemapping.LifecycleMappingFactory.calculateEffectiveLifecycleMappingMetadata(LifecycleMappingFactory.java:249)
        at org.eclipse.m2e.core.internal.lifecyclemapping.LifecycleMappingFactory.calculateLifecycleMapping(LifecycleMappingFactory.java:197)
        at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.setupLifecycleMapping(ProjectRegistryManager.java:642)
        at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refreshPhase2(ProjectRegistryManager.java:562)
        at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.lambda$5(ProjectRegistryManager.java:487)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:458)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:339)
        at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:485)
        at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:370)
        at org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:322)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod.getProjectFacade(MavenBuilder.java:146)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod.lambda$0(MavenBuilder.java:84)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:458)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:339)
        at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:278)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod.execute(MavenBuilder.java:83)
        at org.eclipse.m2e.core.internal.builder.MavenBuilder.build(MavenBuilder.java:192)
        at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:1077)
        at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:47)
        at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:296)
        at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:352)
        at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:441)
        at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:47)
        at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:444)
        at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:555)
        at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:503)
        at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:585)
        at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:207)
        at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:300)
        at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)

Updating the submodule worked when I renamed the .mvn in the parent project...