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java.lang.NullPointerException at join.JoinAction$NoopLauncher.<init>(JoinAction.java:120) at join.JoinAction.checkPendingDownstream(JoinAction.java:92) at join.JoinAction.downstreamFinished(JoinAction.java:70) at join.JoinDependency.shouldTriggerBuild(JoinDependency.java:45) at hudson.tasks.BuildTrigger.execute(BuildTrigger.java:213) at hudson.model.AbstractBuild$AbstractBuildExecution.cleanUp(AbstractBuild.java:741) at hudson.model.Build$BuildExecution.cleanUp(Build.java:194) at hudson.model.Run.execute(Run.java:1715) at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46) at hudson.model.ResourceController.execute(ResourceController.java:88) at hudson.model.Executor.run(Executor.java:231)