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java.lang.NullPointerException: Cannot invoke method notify() on null object	at grails.plugins.airbrake.AirbrakeService.notify(AirbrakeService.groovy:9)	at fahrer.portal.WelcomeController$_closure1.doCall(WelcomeController.groovy:12)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)