Stuart McCulloch wrote:
> 
> the "bundleall" goal assumes you're running it against a jar/bundle
> project
> - it should be more forgiving
> 
Is this all that is going on?  If I change proj2 to be a jar project, I get
the same exception.  The exception happens in the dependency tree builder
[1].  To me (disclaimer: not familiar at all with the code), there seems to
be an issue with version ranges.  

I created a bug https://issues.apache.org/jira/browse/FELIX-1148 and we can
continue the discussion there.  I'd be happy to investigate/work on a patch,
but I'm not what to change in the bundle plugin to avoid the exception.

-Will

[1] java.lang.NullPointerException: version was null for log4j:log4j
        at
org.apache.maven.artifact.DefaultArtifact.getBaseVersion(DefaultArtifact.java:362)
        at
org.apache.maven.artifact.DefaultArtifact.getId(DefaultArtifact.java:225)
        at
org.apache.maven.shared.dependency.tree.DependencyTreeResolutionListener.manageArtifactScope(DependencyTreeResolutionListener.java:358)
        at
org.apache.maven.artifact.resolver.DefaultArtifactCollector.fireEvent(DefaultArtifactCollector.java:547)
        at
org.apache.maven.artifact.resolver.DefaultArtifactCollector.fireEvent(DefaultArtifactCollector.java:500)
        at
org.apache.maven.artifact.resolver.DefaultArtifactCollector.manageArtifact(DefaultArtifactCollector.java:438)
        at
org.apache.maven.artifact.resolver.DefaultArtifactCollector.recurse(DefaultArtifactCollector.java:307)
        at
org.apache.maven.artifact.resolver.DefaultArtifactCollector.recurse(DefaultArtifactCollector.java:408)
        at
org.apache.maven.artifact.resolver.DefaultArtifactCollector.collect(DefaultArtifactCollector.java:76)
        at
org.apache.maven.shared.dependency.tree.DefaultDependencyTreeBuilder.buildDependencyTree(DefaultDependencyTreeBuilder.java:102)
        at
org.apache.felix.bundleplugin.BundleAllPlugin.bundleAll(BundleAllPlugin.java:196)
        at
org.apache.felix.bundleplugin.BundleAllPlugin.bundleAll(BundleAllPlugin.java:165)
        at
org.apache.felix.bundleplugin.BundleAllPlugin.execute(BundleAllPlugin.java:152)
        at
org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:451)
        at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:558)
        at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:512)
        at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:482)
        at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:330)
        at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:291)
        at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:142)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:336)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:129)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:287)
        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:597)
        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)
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