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java.lang.NullPointerException at join.JoinAction$NoopLauncher.<init>( at join.JoinAction.checkPendingDownstream( at join.JoinAction.downstreamFinished( at join.JoinDependency.shouldTriggerBuild( at hudson.tasks.BuildTrigger.execute( at hudson.model.AbstractBuild$AbstractBuildExecution.cleanUp( at hudson.model.Build$BuildExecution.cleanUp( at hudson.model.Run.execute( at at hudson.model.ResourceController.execute( at