When performing a post build tag the exception below is raised. Consequently the build.xml file is not generated in the builds/[jobref] directory and the build will no longer show up in history after restarts.

SEVERE: Executor threw an exception
java.lang.NoSuchMethodError: hudson.model.AbstractBuild.getRootBuild()Lhudson/model/AbstractBuild;
at hudson.plugins.cvs_tag.CvsTagPlugin.perform(CvsTagPlugin.java:68)
at hudson.plugins.cvs_tag.CvsTagPublisher.perform(CvsTagPublisher.java:117)
at hudson.tasks.BuildStepMonitor$3.perform(BuildStepMonitor.java:36)
at hudson.model.AbstractBuild$AbstractRunner.perform(AbstractBuild.java:630)
at hudson.model.AbstractBuild$AbstractRunner.performAllBuildSteps(AbstractBuild.java:608)
at hudson.model.AbstractBuild$AbstractRunner.performAllBuildSteps(AbstractBuild.java:584)
at hudson.model.Build$RunnerImpl.cleanUp(Build.java:168)
at hudson.model.Run.run(Run.java:1409)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:145)