While building a maven2 project with "clean install site" goals, i get a NPE at
the very end of the build which leads to a build failure.
the 5 last builds were broken for various reasons including this one but the 6th
was sucessfull.
Deleting the 5 broken builds solves the problem

Plugin version is 2.7
end of console log was
...
[TASKS] Scipping maven reporter: there is already a result available.
[PMD] Successfully parsed file /jobs/project/workspace/target/pmd.xml of module
project with 0 warnings.
[CHECKSTYLE] Successfully parsed file
/jobs/project/workspace/target/checkstyle-result.xml of module project with 4254
warnings.
[DRY] Successfully parsed file /jobs/project/workspace/target/cpd.xml of module
project with 0 warnings.
[HUDSON] Archiving site
[HUDSON] Archiving /jobs/project/workspace/pom.xml to
/jobs/project/modules/com.myco$project/builds/2009-03-31_20-38-32/archive/com.myco/project/0.0.1-SNAPSHOT/pom.xml
[HUDSON] Archiving /jobs/project/workspace/target/project-0.0.1-SNAPSHOT.jar to
/jobs/project/modules/com.myco$project/builds/2009-03-31_20-38-32/archive/com.myco/project/0.0.1-SNAPSHOT/project-0.0.1-SNAPSHOT.jar
[HUDSON] Archiving /jobs/project/workspace/pom.xml to
/jobs/project/modules/com.myco$project/builds/2009-03-31_20-38-32/archive/com.myco/project/0.0.1-SNAPSHOT/pom.xml
[HUDSON] Archiving /jobs/project/workspace/target/project-0.0.1-SNAPSHOT.jar to
/jobs/project/modules/com.myco$project/builds/2009-03-31_20-38-32/archive/com.myco/project/0.0.1-SNAPSHOT/project-0.0.1-SNAPSHOT.jar
[INFO] ------------------------------------------------------------------------
[ERROR] FATAL ERROR
[INFO] ------------------------------------------------------------------------
[INFO] null
[INFO] ------------------------------------------------------------------------
[INFO] Trace
java.lang.NullPointerException
at
hudson.plugins.checkstyle.CheckStyleMavenResult.hasPreviousResult(CheckStyleMavenResult.java:72)
at hudson.plugins.checkstyle.util.BuildResult.loadNewWarnings(BuildResult.java:608)
at hudson.plugins.checkstyle.util.BuildResult.getNewWarnings(BuildResult.java:594)
at
hudson.plugins.checkstyle.util.AbstractResultAction.updateBuildHealth(AbstractResultAction.java:339)
at
hudson.plugins.checkstyle.MavenCheckStyleResultAction.update(MavenCheckStyleResultAction.java:102)
at hudson.maven.MavenModuleSetBuild.notifyModuleBuild(MavenModuleSetBuild.java:280)
at hudson.maven.MavenBuild$ProxyImpl2.end(MavenBuild.java:386)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at
hudson.remoting.RemoteInvocationHandler$RPCRequest.perform(RemoteInvocationHandler.java:263)
at
hudson.remoting.RemoteInvocationHandler$RPCRequest.call(RemoteInvocationHandler.java:246)
at
hudson.remoting.RemoteInvocationHandler$RPCRequest.call(RemoteInvocationHandler.java:206)
at hudson.remoting.UserRequest.perform(UserRequest.java:92)
at hudson.remoting.UserRequest.perform(UserRequest.java:46)
at hudson.remoting.Request$2.run(Request.java:236)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:417)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:269)
at java.util.concurrent.FutureTask.run(FutureTask.java:123)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
at java.lang.Thread.run(Thread.java:595)
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1 minute 40 seconds
[INFO] Finished at: Tue Mar 31 20:40:16 CEST 2009
[INFO] Final Memory: 72M/137M
[INFO] ------------------------------------------------------------------------
channel stopped
Finished: FAILURE