title: svn-tag Hudson plugin not working
body: <p>I started using Hudson a week ago. I was able to add various plugins to my build cycle (like ci-game, email-ext and Sonar) but i am unable to get the svn-tag to work.</p>
  
  <p>I am using the latest version of the Hudson war (2.2.0) and the version 1.16 of the Subversion Tagging Plugin.</p>
  
  <p>When a build fails test the plugin tells me that it didn't do anything (since the build failed) but, when the build runs fine the plugin tells me nothing.</p>
  
  <p>Checking <a href="http://myserver/hudson/log/all" rel="nofollow">http://myserver/hudson/log/all</a> i can see the following stacktrace:</p>
  
  <pre><code>SEVERE: Executor threw an exception
  java.lang.NoSuchMethodError:     hudson.model.AbstractBuild.getRootBuild()Lhudson/model/AbstractBuild;
      at hudson.plugins.svn_tag.SvnTagPlugin.perform(SvnTagPlugin.java:79)
      at hudson.plugins.svn_tag.SvnTagPublisher.perform(SvnTagPublisher.java:79)
      at hudson.tasks.BuildStepMonitor$3.perform(BuildStepMonitor.java:36)
      at hudson.model.AbstractBuild$AbstractRunner.perform(AbstractBuild.java:630)
      at     hudson.model.AbstractBuild$AbstractRunner.performAllBuildSteps(AbstractBuild.java:608)
      at     hudson.maven.MavenModuleSetBuild$RunnerImpl.cleanUp(MavenModuleSetBuild.java:835)
      at hudson.model.Run.run(Run.java:1409)
      at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:414)
      at hudson.model.ResourceController.execute(ResourceController.java:88)
      at hudson.model.Executor.run(Executor.java:145)
  </code></pre>
  
  <p>Does anyone know how to fix this ? Am i missing something ?
  Thanks in advance!</p>