If I run hudson-dev:run on main/war, or start Hudson 1.300 over JNLP, I can
create a Maven project and run it just fine, using a Maven 1.0.9 installation on
JDK 6. But if I use hpi:run on plugins/*, when I try to run the project, I get

Parsing POMs
ERROR: Failed to parse POMs
org.apache.maven.embedder.MavenEmbedderException: Cannot lookup required component.
at hudson.maven.MavenEmbedder.start(MavenEmbedder.java:722)
at hudson.maven.MavenUtil.createEmbedder(MavenUtil.java:107)
at hudson.maven.MavenModuleSetBuild$PomParser.invoke(MavenModuleSetBuild.java:727)
at hudson.maven.MavenModuleSetBuild$PomParser.invoke(MavenModuleSetBuild.java:675)
at hudson.FilePath.act(FilePath.java:600)
at
hudson.maven.MavenModuleSetBuild$RunnerImpl.parsePoms(MavenModuleSetBuild.java:425)
at hudson.maven.MavenModuleSetBuild$RunnerImpl.doRun(MavenModuleSetBuild.java:315)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:272)
at hudson.model.Run.run(Run.java:923)
at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:234)
at hudson.model.ResourceController.execute(ResourceController.java:93)
at hudson.model.Executor.run(Executor.java:119)
Caused by:
org.codehaus.plexus.component.repository.exception.ComponentLookupException:
Unable to lookup component 'org.apache.maven.project.MavenProjectBuilder', it
could not be started
at
org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:339)
at org.codehaus.plexus.embed.Embedder.lookup(Embedder.java:78)
at hudson.maven.MavenEmbedder.start(MavenEmbedder.java:686)
... 11 more
Caused by:
org.codehaus.plexus.component.repository.exception.ComponentLifecycleException:
Error starting component
at
org.codehaus.plexus.component.manager.AbstractComponentManager.startComponentLifecycle(AbstractComponentManager.java:109)
at
org.codehaus.plexus.component.manager.AbstractComponentManager.createComponentInstance(AbstractComponentManager.java:95)
at
org.codehaus.plexus.component.manager.ClassicSingletonComponentManager.getComponent(ClassicSingletonComponentManager.java:92)
at
org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:331)
... 13 more
Caused by:
org.codehaus.plexus.personality.plexus.lifecycle.phase.PhaseExecutionException:
Error composing component
at
org.codehaus.plexus.personality.plexus.lifecycle.phase.CompositionPhase.execute(CompositionPhase.java:33)
at
org.codehaus.plexus.lifecycle.AbstractLifecycleHandler.start(AbstractLifecycleHandler.java:101)
at
org.codehaus.plexus.component.manager.AbstractComponentManager.startComponentLifecycle(AbstractComponentManager.java:105)
... 16 more
Caused by: org.codehaus.plexus.component.composition.CompositionException:
Composition failed of field modelInterpolator in object of type
org.apache.maven.project.DefaultMavenProjectBuilder because the requirement
ComponentRequirement

{role='org.apache.maven.project.interpolation.ModelInterpolator', roleHint='null', fieldName='null'}

was missing
at
org.codehaus.plexus.component.composition.FieldComponentComposer.assignRequirementToField(FieldComponentComposer.java:154)
at
org.codehaus.plexus.component.composition.FieldComponentComposer.assembleComponent(FieldComponentComposer.java:73)
at
org.codehaus.plexus.component.composition.DefaultComponentComposerManager.assembleComponent(DefaultComponentComposerManager.java:68)
at
org.codehaus.plexus.DefaultPlexusContainer.composeComponent(DefaultPlexusContainer.java:1486)
at
org.codehaus.plexus.personality.plexus.lifecycle.phase.CompositionPhase.execute(CompositionPhase.java:29)
... 18 more
Caused by:
org.codehaus.plexus.component.repository.exception.ComponentLookupException:
Unable to lookup component
'org.apache.maven.project.interpolation.ModelInterpolator', it could not be created
at
org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:335)
at
org.codehaus.plexus.component.composition.FieldComponentComposer.assignRequirementToField(FieldComponentComposer.java:129)
... 22 more
Caused by:
org.codehaus.plexus.component.factory.ComponentInstantiationException: Could not
instanciate component: role:
'org.apache.maven.project.interpolation.ModelInterpolator', implementation:
'org.apache.maven.project.interpolation.RegexBasedModelInterpolator'
at
org.codehaus.plexus.component.factory.java.JavaComponentFactory.makeException(JavaComponentFactory.java:77)
at
org.codehaus.plexus.component.factory.java.JavaComponentFactory.newInstance(JavaComponentFactory.java:62)
at
org.codehaus.plexus.DefaultPlexusContainer.createComponentInstance(DefaultPlexusContainer.java:1464)
at
org.codehaus.plexus.component.manager.AbstractComponentManager.createComponentInstance(AbstractComponentManager.java:93)
at
org.codehaus.plexus.component.manager.ClassicSingletonComponentManager.getComponent(ClassicSingletonComponentManager.java:92)
at
org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:331)
... 23 more
Caused by: java.lang.NoSuchMethodError:
org.codehaus.plexus.util.cli.CommandLineUtils.getSystemEnvVars()Ljava/util/Properties;
at
org.apache.maven.project.interpolation.RegexBasedModelInterpolator.<init>(RegexBasedModelInterpolator.java:63)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at java.lang.Class.newInstance0(Class.java:355)
at java.lang.Class.newInstance(Class.java:308)
at
org.codehaus.plexus.component.factory.java.JavaComponentFactory.newInstance(JavaComponentFactory.java:44)
... 27 more

Looking at

http://fisheye.codehaus.org/browse/plexus/plexus-utils/trunk/src/main/java/org/codehaus/plexus/util/cli/CommandLineUtils.java

I can see that the method in question was added in plexus-utils-1.0.5. But where
is an older version of this library coming from? I cannot find any reference to
it in Hudson sources, and the actual jobs/.work/plugins/maven-plugin.hpi
contains plexus-utils-1.5.1.jar, which has the method.