If a Maven 2/3 project is configured to execute the javadoc:javadoc goal, the job fails with a NullPointerException (see below). This problem does not occur if the job is a free-style project and the Maven is executed via a "Invoke top-level Maven target" build step. While this is a possible workaround, the upstream-downstream dependency resolution is not performed (which we heavily rely on).

We're using the Maven 3.0.2 coming with Jenkins 1.445. Version of maven-javadoc-plugin is 2.8. All of this works fine on the command line, btw.

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[JENKINS] Archiving /var/lib/jenkins/jobs/javadoc-job/workspace/pom.xml to /var/lib/jenkins/jobs/javadoc-job/modules/groupId$artifactId/builds/2012-01-09_11-06-26/archive/groupId/artifactId/2.8.0-SNAPSHOT/artifactId-2.8.0-SNAPSHOT.pom
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 7.041s
[INFO] Finished at: Mon Jan 09 11:06:37 CET 2012
[INFO] Final Memory: 19M/899M
[INFO] ------------------------------------------------------------------------
mavenExecutionResult exceptions not empty
message : Internal error: java.lang.NullPointerException
cause : null
Stack trace :
org.apache.maven.InternalErrorException: Internal error: java.lang.NullPointerException
at org.apache.maven.lifecycle.internal.BuilderCommon.handleBuildError(BuilderCommon.java:128)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:95)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:319)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
at org.jvnet.hudson.maven3.launcher.Maven3Launcher.main(Maven3Launcher.java:79)
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.plexus.classworlds.launcher.Launcher.launchStandard(Launcher.java:329)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:239)
at org.jvnet.hudson.maven3.agent.Maven3Main.launch(Maven3Main.java:158)
at hudson.maven.Maven3Builder.call(Maven3Builder.java:112)
at hudson.maven.Maven3Builder.call(Maven3Builder.java:70)
at hudson.remoting.UserRequest.perform(UserRequest.java:118)
at hudson.remoting.UserRequest.perform(UserRequest.java:48)
at hudson.remoting.Request$2.run(Request.java:287)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.NullPointerException
at hudson.maven.ExecutedMojo.getMojoClass(ExecutedMojo.java:114)
at hudson.maven.ExecutedMojo.<init>(ExecutedMojo.java:99)
at hudson.maven.Maven3Builder$MavenExecutionListener.recordExecutionTime(Maven3Builder.java:524)
at hudson.maven.Maven3Builder$MavenExecutionListener.recordMojoSucceeded(Maven3Builder.java:493)
at hudson.maven.Maven3Builder$MavenExecutionListener.forkSucceeded(Maven3Builder.java:601)
at org.apache.maven.lifecycle.internal.DefaultExecutionEventCatapult.fire(DefaultExecutionEventCatapult.java:97)
at org.apache.maven.lifecycle.internal.DefaultExecutionEventCatapult.fire(DefaultExecutionEventCatapult.java:42)
at org.apache.maven.lifecycle.internal.MojoExecutor.executeForkedExecutions(MojoExecutor.java:383)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:199)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
... 24 more
channel stopped
Notifying upstream projects of job completion
Finished: FAILURE