"unpack" fails due to NoSuchElementException

[cluick]

Hi! I´m using Eclipse Mars (Win x64, Java 1.8.0_45) with m2e-maven-dependency-plugin 0.0.4.201409291703. I have a maven project in my workspace (WAR artifact) were the maven-dependency-plugin's "unpack" goal is executed in the "validate" phase to unpack some files which are required later on in the "generate" phase for code generation. The unpacked artifact is also present in the same eclipse workspace. The build of the WAR artifact in Eclipse fails with the following error (reported as "Maven Build Problem" in the "Problems" view):

Execution copy-basedata of goal org.apache.maven.plugins:maven-dependency-plugin:2.8:unpack failed: Unable to load the mojo 'unpack' (or one of its required components) from the plugin 'org.apache.maven.plugins:maven-dependency-plugin:2.8' (org.apache.maven.plugins:maven-dependency-plugin:2.8:unpack:copy-basedata:validate)

In the error details I´ve found the following stack trace:

org.apache.maven.plugin.PluginExecutionException: Execution copy-basedata of goal org.apache.maven.plugins:maven-dependency-plugin:2.8:unpack failed: Unable to load the mojo 'unpack' (or one of its required components) from the plugin 'org.apache.maven.plugins:maven-dependency-plugin:2.8' at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:153) at org.eclipse.m2e.core.internal.embedder.MavenImpl.execute(MavenImpl.java:331) at org.eclipse.m2e.core.internal.embedder.MavenImpl$11.call(MavenImpl.java:1362) at org.eclipse.m2e.core.internal.embedder.MavenImpl$11.call(MavenImpl.java:1) at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176) at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:112) at org.eclipse.m2e.core.internal.embedder.MavenImpl.execute(MavenImpl.java:1360) at org.eclipse.m2e.core.project.configurator.MojoExecutionBuildParticipant.build(MojoExecutionBuildParticipant.java:52) at com.ianbrandt.tools.m2e.mdp.core.MdpBuildParticipant.executeMojo(MdpBuildParticipant.java:133) at com.ianbrandt.tools.m2e.mdp.core.MdpBuildParticipant.build(MdpBuildParticipant.java:67) at org.eclipse.m2e.core.internal.builder.MavenBuilderImpl.build(MavenBuilderImpl.java:137) at org.eclipse.m2e.core.internal.builder.MavenBuilder$1.method(MavenBuilder.java:172) at org.eclipse.m2e.core.internal.builder.MavenBuilder$1.method(MavenBuilder.java:1) at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod$1$1.call(MavenBuilder.java:115) at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176) at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:112) at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod$1.call(MavenBuilder.java:105) at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176) at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:151) at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:99) at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod.execute(MavenBuilder.java:86) at org.eclipse.m2e.core.internal.builder.MavenBuilder.build(MavenBuilder.java:200) at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:734) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:205) at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:245) at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:300) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:303) at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:359) at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:382) at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:144) at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:235) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: org.apache.maven.plugin.PluginContainerException: Unable to load the mojo 'unpack' (or one of its required components) from the plugin 'org.apache.maven.plugins:maven-dependency-plugin:2.8' at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getConfiguredMojo(DefaultMavenPluginManager.java:579) at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:121) ... 33 more Caused by: org.codehaus.plexus.component.repository.exception.ComponentLookupException: java.util.NoSuchElementException role: org.apache.maven.plugin.Mojo roleHint: org.apache.maven.plugins:maven-dependency-plugin:2.8:unpack at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:267) at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:255) at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getConfiguredMojo(DefaultMavenPluginManager.java:546) ... 34 more Caused by: java.util.NoSuchElementException at org.eclipse.sisu.plexus.RealmFilteredBeans$FilteredItr.next(RealmFilteredBeans.java:118) at org.eclipse.sisu.plexus.RealmFilteredBeans$FilteredItr.next(RealmFilteredBeans.java:1) at org.eclipse.sisu.plexus.DefaultPlexusBeans$Itr.next(DefaultPlexusBeans.java:76) at org.eclipse.sisu.plexus.DefaultPlexusBeans$Itr.next(DefaultPlexusBeans.java:1) at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:263) ... 36 more

I´m absolutely not sure if this is a bug in the m2e-maven-dependency-plugin but I have no idea were to start. Can you please have a look on it?

Thank you & best regards, Christof Luick

[vguna]

Same here. Using:

Version: Mars.1 Release (4.5.1) Build id: 20150924-1200

with 0.0.4 plugin version.

Stacktrace:

java.util.NoSuchElementException
      role: org.eclipse.aether.RepositorySystem
  roleHint:  (org.apache.maven.plugins:maven-dependency-plugin:2.8:unpack-dependencies:unpack-shared-resources_configuration:generate-resources)

org.codehaus.plexus.component.repository.exception.ComponentLookupException: java.util.NoSuchElementException
      role: org.eclipse.aether.RepositorySystem
  roleHint: 
    at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:267)
    at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:255)
    at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:249)
    at com.coderplus.utils.BuildHelper.<init>(BuildHelper.java:159)
    at com.ianbrandt.tools.m2e.mdp.core.MdpBuildParticipant.build(MdpBuildParticipant.java:65)
    at org.eclipse.m2e.core.internal.builder.MavenBuilderImpl.build(MavenBuilderImpl.java:137)
    at org.eclipse.m2e.core.internal.builder.MavenBuilder$1.method(MavenBuilder.java:172)
    at org.eclipse.m2e.core.internal.builder.MavenBuilder$1.method(MavenBuilder.java:1)
    at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod$1$1.call(MavenBuilder.java:115)
    at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176)
    at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:112)
    at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod$1.call(MavenBuilder.java:105)
    at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:176)
    at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:151)
    at org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:99)
    at org.eclipse.m2e.core.internal.builder.MavenBuilder$BuildMethod.execute(MavenBuilder.java:86)
    at org.eclipse.m2e.core.internal.builder.MavenBuilder.build(MavenBuilder.java:200)
    at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:734)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:205)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:245)
    at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:300)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:303)
    at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:359)
    at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:382)
    at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:144)
    at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:235)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
Caused by: java.util.NoSuchElementException
    at org.eclipse.sisu.plexus.RealmFilteredBeans$FilteredItr.next(RealmFilteredBeans.java:118)
    at org.eclipse.sisu.plexus.RealmFilteredBeans$FilteredItr.next(RealmFilteredBeans.java:1)
    at org.eclipse.sisu.plexus.DefaultPlexusBeans$Itr.next(DefaultPlexusBeans.java:76)
    at org.eclipse.sisu.plexus.DefaultPlexusBeans$Itr.next(DefaultPlexusBeans.java:1)
    at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:263)
    ... 28 more