Grails 2.5.3 NPE on production deployment (assets-pipeline) - grails

Question

I got the following stacktrace when I try to access login page of my application:
21.03.2016 19:01:52,746: (HVK3) GrailsExceptionResolver: NullPointerException occurred when processing request: [GET] /wmp-hvk3-development/login/auth
Stacktrace follows:
org.codehaus.groovy.grails.web.pages.exceptions.GroovyPagesException: Error processing GroovyPageView: null
at grails.plugin.cache.web.filter.PageFragmentCachingFilter.doFilter(PageFragmentCachingFilter.java:198)
at grails.plugin.cache.web.filter.AbstractFilter.doFilter(AbstractFilter.java:63)
at grails.plugin.springsecurity.web.filter.GrailsAnonymousAuthenticationFilter.doFilter(GrailsAnonymousAuthenticationFilter.java:53)
at grails.plugin.springsecurity.web.authentication.logout.MutableLogoutFilter.doFilter(MutableLogoutFilter.java:62)
at grails.plugin.springsecurity.web.SecurityRequestHolderFilter.doFilter(SecurityRequestHolderFilter.java:59)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
Caused by: java.lang.NullPointerException
at java.util.Hashtable.hash(Hashtable.java:262)
at java.util.Hashtable.get(Hashtable.java:459)
at java.util.Properties.getProperty(Properties.java:951)
at asset.pipeline.grails.AssetProcessorService.getResolvedAssetPath(AssetProcessorService.groovy:57)
at asset.pipeline.grails.AssetProcessorService.asset(AssetProcessorService.groovy:72)
at asset.pipeline.grails.CachingLinkGenerator.asset(CachingLinkGenerator.groovy:32)
at asset.pipeline.grails.CachingLinkGenerator.resource(CachingLinkGenerator.groovy:24)
at gsp_wmpHvk3Development_loginauth_gsp$_run_closure2.doCall(gsp_wmpHvk3Development_loginauth_gsp.groovy:67)
Application works perfectly in test environment on local workstation but this stacktrace occurs when I deploy to production.
Im not sure what to make out of it, I guess there is a problem with the assets-pipeline assets path since AssetProcessorService.groovy:57 states:
I'm on RedHat linux running tomcat 7 with java 1.7 with assets pipeline 2.7.2 plugin as compile dependency and spring security core plugin 2.0.0 compile time dependency.

Answer 1

This was caused by missing configuration in BuildConfig. I added the following to the end of the file and it fixed this:
// This closure is passed the command line arguments used to start the war process.
grails.war.copyToWebApp = { args ->
fileset(dir: "web-app") {
include(name: "js/**")
include(name: "css/**")
include(name: "WEB-INF/**")
}
}