[m2e-users] Errors on m2e 1.4 without direct internet connection

[Heiko <techteam@xxxxxx>]

Hi,
due to security constraints, we must carry out our development without 
direct internet connections.
In the past I used Juno Eclipse SR2 with m2e 1.3and Tycho 0.16 - 0.18.
All necessary data were available on Nexus or a p2 repositories.
With the update to Eclipse Kepler and m2e 1.4 but now I have serious 
internal errosr when I try toupdate / refresh my maven / tycho projects.

Stack Trace:
Error
Mon Jul 08 15:33:06 CEST 2013
Errors running builder 'Maven Project Builder' on project 'foo.bar'.

java.lang.NullPointerException
    at 
org.eclipse.m2e.core.internal.lifecyclemapping.SimpleMappingMetadataSource.getPluginExecutionMetadata(SimpleMappingMetadataSource.java:71)
    at 
org.eclipse.m2e.core.internal.lifecyclemapping.LifecycleMappingFactory.calculateEffectiveLifecycleMappingMetadata0(LifecycleMappingFactory.java:512)
    at 
org.eclipse.m2e.core.internal.lifecyclemapping.LifecycleMappingFactory.calculateEffectiveLifecycleMappingMetadata(LifecycleMappingFactory.java:454)
    at 
org.eclipse.m2e.core.internal.lifecyclemapping.LifecycleMappingFactory.calculateEffectiveLifecycleMappingMetadata(LifecycleMappingFactory.java:244)
    at 
org.eclipse.m2e.core.internal.lifecyclemapping.LifecycleMappingFactory.calculateLifecycleMapping(LifecycleMappingFactory.java:176)
    at 
org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.setupLifecycleMapping(ProjectRegistryManager.java:547)
    at 
org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refreshPhase2(ProjectRegistryManager.java:474)
    at 
org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager$3.call(ProjectRegistryManager.java:453)
    at 
org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager$3.call(ProjectRegistryManager.java:1)
    at 
org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:161)
    at 
org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:137)
    at 
org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:457)
    at 
org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:334)
    at 
org.eclipse.m2e.core.internal.project.registry.ProjectRegistryManager.refresh(ProjectRegistryManager.java:287)
    at 
org.eclipse.m2e.core.internal.project.registry.MavenProjectManager.refresh(MavenProjectManager.java:67)
    at 
org.eclipse.m2e.core.internal.builder.MavenBuilder.getProjectFacade(MavenBuilder.java:216)
    at 
org.eclipse.m2e.core.internal.builder.MavenBuilder$1.call(MavenBuilder.java:91)
    at 
org.eclipse.m2e.core.internal.builder.MavenBuilder$1.call(MavenBuilder.java:1)
    at 
org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.executeBare(MavenExecutionContext.java:161)
    at 
org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:137)
    at 
org.eclipse.m2e.core.internal.embedder.MavenExecutionContext.execute(MavenExecutionContext.java:89)
    at 
org.eclipse.m2e.core.internal.embedder.MavenImpl.execute(MavenImpl.java:1305)
    at 
org.eclipse.m2e.core.internal.builder.MavenBuilder.build(MavenBuilder.java:89)
    at 
org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:726)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at 
org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:199)
    at 
org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:239)
    at 
org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:292)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at 
org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:295)
    at 
org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:351)
    at 
org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:374)
    at 
org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:143)
    at 
org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:241)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)


A similar demo project (pom same configuration) with active Internet 
connection works without problems.

M2e still needs certain data at runtime from maven / p2 repositories?
Or what could be raise this error?

Thanks in advance
Heiko