------------------------------------------------------------------
Running Maven...
/home/jerome/Dev/OSS/m2/maven-components/bootstrap/target/installation/bin/mvn -e --batch-mode clean install
+ Error stacktraces are turned on.
settings.getPluginGroups().size() = 0
[INFO] Scanning for projects...
[INFO] Reactor build order:
[INFO]   Maven
[INFO]   Maven Model
[INFO]   Maven Local Settings Model
[INFO]   Maven Repository Metadata Model
[INFO]   Maven Artifact
[INFO]   Maven Artifact Manager
[INFO]   Maven Tools
[INFO]   Maven Artifact Test Helper Library
[INFO]   Maven Profile Model
[INFO]   Maven Project Builder
[INFO]   Maven Archiver
[INFO]   Maven Plugin Parameter Documenter API
[INFO]   Maven Error Diagnostics
[INFO]   Maven Plugin API
[INFO]   Maven Reporting
[INFO]   Maven Reporting API
[INFO]   Maven Plugin Registry Model
[INFO]   Maven Plugin Descriptor Model
[INFO]   Maven Monitor
[INFO]   Maven Core
[INFO]   Maven Model Converter
[INFO]   Maven Plugin Tools Base POM
[INFO]   Maven Plugin Tools APIs
[INFO]   Maven Plugin Tools for Java
[INFO]   Maven Plugin Tools for Beanshell
[INFO]   Maven Pluggy Simplistic Plugin Generator
[INFO]   Maven Plugin Metadata Model
[INFO]   Maven Ant Plugin Tools
[INFO]   Maven Reporting Implementation
[INFO]   Maven Script Support Root
[INFO]   Maven Ant Mojo Support
[INFO]   Maven Beanshell Mojo Support
[INFO]   Maven Embedder
[INFO]   Maven Core - CLI
[INFO] ----------------------------------------------------------------------------
[INFO] Building Maven
[INFO]    task-segment: [clean, install]
[INFO] ----------------------------------------------------------------------------
[INFO] snapshot org.apache.maven.plugins:maven-clean-plugin:2.0.1-SNAPSHOT: checking for updates from apache.snapshots
[INFO] ------------------------------------------------------------------------
[ERROR] FATAL ERROR
[INFO] ------------------------------------------------------------------------
[INFO] null
[INFO] ------------------------------------------------------------------------
[INFO] Trace
java.lang.NullPointerException
        at org.apache.maven.plugin.DefaultPluginManager.addPlugin(DefaultPluginManager.java:292)
        at org.apache.maven.plugin.DefaultPluginManager.verifyVersionedPlugin(DefaultPluginManager.java:198)
        at org.apache.maven.plugin.DefaultPluginManager.verifyPlugin(DefaultPluginManager.java:163)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.verifyPlugin(DefaultLifecycleExecutor.java:1252)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.getMojoDescriptor(DefaultLifecycleExecutor.java:1517)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.bindLifecycleForPackaging(DefaultLifecycleExecutor.java:1011)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.constructLifecycleMappings(DefaultLifecycleExecutor.java:975)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:453)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:306)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:273)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:140)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:381)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:170)
        at org.apache.maven.embedder.MavenEmbedder.execute(MavenEmbedder.java:702)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:372)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
        at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
        at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
        at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2 seconds
[INFO] Finished at: Thu Jun 08 12:21:03 CEST 2006
[INFO] Final Memory: 3M/6M
[INFO] ------------------------------------------------------------------------
FATAL ERROR: Unable to configure the Maven application
Error stacktrace:
org.apache.maven.reactor.MavenExecutionException: Error executing project within the reactor
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:206)
        at org.apache.maven.embedder.MavenEmbedder.execute(MavenEmbedder.java:702)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:372)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
        at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
        at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
        at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: java.lang.NullPointerException
        at org.apache.maven.plugin.DefaultPluginManager.addPlugin(DefaultPluginManager.java:292)
        at org.apache.maven.plugin.DefaultPluginManager.verifyVersionedPlugin(DefaultPluginManager.java:198)
        at org.apache.maven.plugin.DefaultPluginManager.verifyPlugin(DefaultPluginManager.java:163)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.verifyPlugin(DefaultLifecycleExecutor.java:1252)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.getMojoDescriptor(DefaultLifecycleExecutor.java:1517)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.bindLifecycleForPackaging(DefaultLifecycleExecutor.java:1011)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.constructLifecycleMappings(DefaultLifecycleExecutor.java:975)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:453)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:306)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:273)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:140)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:381)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:170)
        ... 10 more
Exception in thread "main" java.lang.Exception: Error executing Maven: exit code = 1
        at org.apache.maven.bootstrap.installer.BootstrapInstaller.runMaven(BootstrapInstaller.java:224)
        at org.apache.maven.bootstrap.installer.BootstrapInstaller.run(BootstrapInstaller.java:130)
        at org.apache.maven.bootstrap.installer.BootstrapInstaller.main(BootstrapInstaller.java:93)