reactor tag causing NPE before post-processing

[__matthewHawthorne]

I am attempting to use the reactor tag, as in the Maven User Guide.  The 
following tag:

<maven:reactor
           basedir="${basedir}/projects"
           postProcessing="true"
           includes="*/project.xml"
           goals="site"
           banner="Generating Site"
           ignoreFailures="true"/>
Causes the following exception:

BUILD FAILED
java.lang.NullPointerException
       at 
org.apache.commons.jelly.impl.TagScript.configureTag(TagScript.java:512)
       at 
org.apache.commons.jelly.impl.TagScript.getTag(TagScript.java:315)
       at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:228)
       at 
org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:135)
       at 
org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:233)
       at com.werken.werkz.jelly.GoalTag$1.performAction(GoalTag.java:116)
       at com.werken.werkz.Goal.fire(Goal.java:639)
       at com.werken.werkz.Goal.attain(Goal.java:575)
       at 
org.apache.maven.plugin.PluginManager.attainGoals(PluginManager.java:394)
       at org.apache.maven.MavenSession.attainGoals(MavenSession.java:357)
       at org.apache.maven.cli.App.doMain(App.java:524)
       at org.apache.maven.cli.App.main(App.java:1080)
       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:324)
       at com.werken.forehead.Forehead.run(Forehead.java:543)
       at com.werken.forehead.Forehead.main(Forehead.java:573)
java.lang.NullPointerException
Total time:  2 seconds

I  can't find any specific documentation on the reactor tag.  Can anyone 
see a reason why this exception is occuring?

Any help is appreciated.



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