Grails global error handler -

i've defined following global error handlers in urlmappings.groovy

    "404"(controller: "error", action: "notfound")     "500"(controller: "error", action: "servererror") 

the handlers implemented this:

class errorcontroller {      def notfound() {         flash.msg = "not found"         redirect uri: '/'     }      def servererror() {         flash.msg = "oops"         redirect uri: '/'     } } 

when 404 error occurs works fine, when 500 error occurs flash scope empty when redirect /. there reason why flash scope should cleared after 500 (caused uncaught exception on server)?

are sure have 1 mapping 500 error code?

make sure have 1 mapping 500 in urlmappings.groovy (remove or comment out default mapping provided grails on create-app)

static mappings = {     "404"(controller: "error", action: "notfound")     "500"(controller: "error", action: "servererror")      "/"(view:"/index") //or whichever view have root context.     //"500"(view:'/error') [culprit] } 

it should work expected above url mapping.

well placing matters, if place custom mapping 500 after default mapping provided grails, see result expected. last mapping overrides older one.