Change By: Olaf Lenz (05/Oct/12 8:32 AM)
Description: Since having updated Jenkins to 1.481 and the Warnings Plugin to  1  4 . 416 16  (and subsequently to  1  4 . 417 17 ), I get the following errors in some of the jobs:

{noformat}
ERROR: Publisher hudson.plugins.warnings.WarningsPublisher aborted due to exception
java.lang.NullPointerException
at hudson.plugins.warnings.WarningsResult.getFileName(WarningsResult.java:108)
at hudson.plugins.warnings.WarningsResult.getSerializationFileName(WarningsResult.java:94)
at hudson.plugins.analysis.core.BuildResult.getDataFile(BuildResult.java:481)
at hudson.plugins.analysis.core.BuildResult.loadResult(BuildResult.java:896)
at hudson.plugins.analysis.core.BuildResult.getProject(BuildResult.java:880)
at hudson.plugins.analysis.core.BuildResult.getContainer(BuildResult.java:1020)
at hudson.plugins.analysis.core.BuildResult.getAnnotations(BuildResult.java:563)
at hudson.plugins.analysis.core.HealthAwarePublisher.perform(HealthAwarePublisher.java:238)
at hudson.plugins.analysis.core.HealthAwareRecorder.perform(HealthAwareRecorder.java:289)
at hudson.tasks.BuildStepMonitor$2.perform(BuildStepMonitor.java:27)
at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:717)
at hudson.model.AbstractBuild$AbstractBuildExecution.performAllBuildSteps(AbstractBuild.java:692)
at hudson.model.Build$BuildExecution.post2(Build.java:183)
at hudson.model.AbstractBuild$AbstractBuildExecution.post(AbstractBuild.java:639)
at hudson.model.Run.execute(Run.java:1527)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:236)
{noformat}

An example is this job: [http://espressomd.org/jenkins/job/ESPResSo-nightly-distcheck/] 
I have attached a tarfile of the whole job directory (without the artifacts), so that you can check for yourself.

Here is some more information:
* The error is reproducible when running the job again.
* After the discussion in the plugin's comment section, I have checked the contents of the job directory.
** Build 224 has a file {{build.xml}} that contains three {{<result class="hudson.plugins.warnings.WarningsResult">}} tags, but all of them have a {{<group>}} subtag and the corresponding {{*-warnings.xml}}-file. The log contains the error.
** The build before ran without any trouble. Its {{build.xml}} does not contain any {{WarningResult}} tag, as the plugin was deactivated during that time.
** All other builds before either contained one (or more) files {{compiler-warnings.xml}} and the corresponding sections in {{build.xml}}.
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