Googling for your error message I found this:

http://issues.apache.org/bugzilla/show_bug.cgi?id=36733

Can you provide more specific information about your environment or, better, open a jira ticket with a reproducible test case attached?

Cheers,
-Lukas


Jon Strayer wrote:
I just installed this plugin an now my builds fail with this exception:

Any ideas?

java.lang.NullPointerException
       at
org.apache.tools.ant.taskdefs.optional.junit.XMLJUnitResultFormatter.formatOutput
(XMLJUnitResultFormatter.java:253)
       at
org.apache.tools.ant.taskdefs.optional.junit.XMLJUnitResultFormatter.setSystemOutput
(XMLJUnitResultFormatter.java:92)
       at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.sendOutAndErr(
JUnitTestRunner.java:435)
       at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(
JUnitTestRunner.java:319)
       at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.executeInVM(
JUnitTask.java:1072)
       at org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.execute(
JUnitTask.java:682)
       at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.executeOrQueue(
JUnitTask.java:1434)
       at org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.execute(
JUnitTask.java:632)
       at org.apache.tools.ant.Task.perform(Task.java:364)
       at org.apache.commons.jelly.tags.ant.AntTag.doTag(AntTag.java:195)
       at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:247)
       at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java
:95)
       at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java
:186)
       at org.apache.commons.jelly.tags.core.IfTag.doTag(IfTag.java:42)
       at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:247)
       at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java
:95)
       at org.apache.maven.jelly.tags.werkz.MavenGoalTag.runBodyTag(
MavenGoalTag.java:78)
       at
org.apache.maven.jelly.tags.werkz.MavenGoalTag$MavenGoalAction.performAction
(MavenGoalTag.java:109)
       at org.apache.maven.werkz.Goal.fire(Goal.java:656)
       at org.apache.maven.werkz.Goal.attain(Goal.java:592)
       at org.apache.maven.werkz.Goal.attainPrecursors(Goal.java:505)
       at org.apache.maven.werkz.Goal.attain(Goal.java:590)
       at org.apache.maven.plugin.PluginManager.attainGoals(
PluginManager.java:693)
       at org.apache.maven.MavenSession.attainGoals(MavenSession.java:263)
       at org.apache.maven.cli.App.doMain(App.java:511)
       at org.apache.maven.cli.App.main(App.java:1258)
       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:551)
       at com.werken.forehead.Forehead.main(Forehead.java:581)


On 5/8/06, Lukas Theussl <[EMAIL PROTECTED]> wrote:


We are pleased to announce the Maven Test Plugin 1.8 release!

http://maven.apache.org/maven-1.x/plugins/test/

Run JUnit tests.


===============================================================================

Changes in this version include:

   New Features:

o Set junit's showoutput attribute if Maven is executed in debug (-X)
mode.
   Fixes MPTEST-43.
o Allow to add additional elements to the test classpath, new property
   maven.test.classpath. Fixes MPTEST-47. Thanks to Henning
Schmiedehausen.
o Display a warning if some tests do not pass (and
   maven.test.failure.ignore=true). Fixes MPTEST-36.
o Add timeouts to the test plugin, new property maven.junit.timeout. Fixes
   MPTEST-10.
o Add ability to fail the build on test errors, new property
   maven.test.error.ignore. Fixes MPTEST-58. Thanks to Mauro Botelho.
o Add maven.test.excludeXmlApis property to avoid duplicated Xerces. Fixes
   MPTEST-55. Thanks to Eric Hartmann.

   Fixed bugs:

o test:test should honour the maven.test.compile.src.set variable. Fixes
   MPTEST-49.
o Do not execute test:test-resources and test:compile unless tests will
be run.
   Fixes MPTEST-46.
o test:single should ignore maven.test.skip=true. Fixes MPTEST-59.
o Test failure doesn't halt execution of test suite. Fixes MPTEST-39.

   Changes:

o Upgrade to Xerces 2.8.0. Replace the deprecated xmlParserAPIs by
xml-apis
   1.3.03. Add the xml-resolver dependency for xerces. Fixes MAVEN-1753.
o Upgrade to Junit 3.8.2.
o Update dependencies to match ones in maven 1.1 core and to unify them
   between plugins. Fixes MAVEN-1712.


===============================================================================


To automatically install the plugin, type the following on a single line:

maven plugin:download

-Dmaven.repo.remote=http://www.ibiblio.org/maven,
http://cvs.apache.org/repository/
   -DgroupId=maven
   -DartifactId=maven-test-plugin
   -Dversion=1.8

For a manual installation, you can download the plugin here:

http://www.apache.org/dyn/closer.cgi/java-repository/maven/plugins/maven-test-plugin-1.8.jar


Have fun!
-The Maven Test Plugin development team

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Esse quam videri
(to be rather than to seem)



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