Grails Runtime Exception

Error Details

Error 500: Executing action [show] of controller [hko.dealnews.controller.DealsController] caused exception: Runtime error executing action
Servlet: grails
URI: /grails/deals/show.dispatch
Exception Message: Cannot get property 'rsssource' on null object
Caused by: Cannot get property 'rsssource' on null object
Class: DealsController
At Line: [587]
Code Snippet:

Stack Trace

java.lang.NullPointerException: Cannot get property 'rsssource' on null object

at hko.dealnews.controller.DealsController$_closure14.doCall(DealsController.groovy:587)
at grails.plugin.cache.web.filter.PageFragmentCachingFilter.doFilter(PageFragmentCachingFilter.java:198)
at grails.plugin.cache.web.filter.AbstractFilter.doFilter(AbstractFilter.java:63)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)