NullPointer exception when scaffolding first Grails app -


starting out grails have installed grails version 2.4.0 , using jdk 1.7.0_55 on gnu/linux sequence of actions below keep getting nullpointerexception. can provide pointer missing or doing wrong ?

grails create-app firstgrails  cd firstgrails  grails  grails> run-app

i go localhost:8080/firstgrails , see generated page.

next do

grails> create-domain-class tag

and go firstgrails/grails-app/domain/firstgrails folder , edit tag.groovy contains:

// tag.groovy package firstgrails  class tag {     string name     string description }

next

grails> create-controller tag

and edit firstgrails/grailsapp/controllers/firstgrails/tagcontroller.groovy into

// tagcontroller.groovy package firstgrails  class tagcontroller {     static scaffold = tag }

i reload in browser , firstgrails.tagcontroller added list of available controllers under welcome message. selecting it, create tag name , description , tag shows in list of tags expected. whenever try add second tag 500 error: internal server error with

uri: /firstgrails/tag/create class: java.lang.nullpointerexception message: null

the trace in console is:

 error 2014-06-03 18:28:31,714 [http-bio-8080-exec-2] error errors.grailsexceptionresolver  - nullpointerexception occurred when processing request: [get] /firstgrails/tag/create stacktrace follows: message: error processing groovypageview: error executing tag <g:form>: error executing tag <g:render>: null     line | method ->>  527 | dofilter  in /tag/create - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  caused grailstagexception: error executing tag <g:form>: error executing tag <g:render>: null ->>   35 | docall    in /tag/create - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  caused grailstagexception: error executing tag <g:render>: null ->>   30 | docall    in /tag/create - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  caused nullpointerexception: null ->>  333 | hash      in java.util.concurrent.concurrenthashmap - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  |    988 |       in     '' |    141 | getvalue  in grails.util.cacheentry |     81 | getvalue  in     '' |     73 | docall .  in tag_create$_run_closure2_closure24 |     78 | docall    in tag_create$_run_closure2 |     81 | run . . . in tag_create |    189 | dofilter  in grails.plugin.cache.web.filter.pagefragmentcachingfilter |     63 | dofilter  in grails.plugin.cache.web.filter.abstractfilter |   1145 | runworker in java.util.concurrent.threadpoolexecutor |    615 | run . . . in java.util.concurrent.threadpoolexecutor$worker ^    745 | run       in java.lang.thread | error 2014-06-03 18:30:33,050 [http-bio-8080-exec-9] error errors.grailsexceptionresolver  - nullpointerexception occurred when processing request: [get] /firstgrails/tag/create stacktrace follows: message: error processing groovypageview: error executing tag <g:form>: error executing tag <g:render>: null     line | method ->>  527 | dofilter  in /tag/create - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  caused grailstagexception: error executing tag <g:form>: error executing tag <g:render>: null ->>   35 | docall    in /tag/create - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  caused grailstagexception: error executing tag <g:render>: null ->>   30 | docall    in /tag/create - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  caused nullpointerexception: null ->>  333 | hash      in java.util.concurrent.concurrenthashmap - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  |    988 |       in     '' |    141 | getvalue  in grails.util.cacheentry |     81 | getvalue  in     '' |     73 | docall .  in tag_create$_run_closure2_closure24 |     78 | docall    in tag_create$_run_closure2 |     81 | run . . . in tag_create |    189 | dofilter  in grails.plugin.cache.web.filter.pagefragmentcachingfilter |     63 | dofilter  in grails.plugin.cache.web.filter.abstractfilter |   1145 | runworker in java.util.concurrent.threadpoolexecutor |    615 | run . . . in java.util.concurrent.threadpoolexecutor$worker ^    745 | run       in java.lang.thread | error 2014-06-03 18:32:21,796 [http-bio-8080-exec-5] error errors.grailsexceptionresolver  - nullpointerexception occurred when processing request: [get] /firstgrails/tag/create stacktrace follows: message: error processing groovypageview: error executing tag <g:form>: error executing tag <g:render>: null     line | method ->>  527 | dofilter  in /tag/create - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  caused grailstagexception: error executing tag <g:form>: error executing tag <g:render>: null ->>   35 | docall    in /tag/create - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  caused grailstagexception: error executing tag <g:render>: null ->>   30 | docall    in /tag/create - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  caused nullpointerexception: null ->>  333 | hash      in java.util.concurrent.concurrenthashmap - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  |    988 |       in     '' |    141 | getvalue  in grails.util.cacheentry |     81 | getvalue  in     '' |     73 | docall .  in tag_create$_run_closure2_closure24 |     78 | docall    in tag_create$_run_closure2 |     81 | run . . . in tag_create |    189 | dofilter  in grails.plugin.cache.web.filter.pagefragmentcachingfilter |     63 | dofilter  in grails.plugin.cache.web.filter.abstractfilter |   1145 | runworker in java.util.concurrent.threadpoolexecutor |    615 | run . . . in java.util.concurrent.threadpoolexecutor$worker ^    745 | run       in java.lang.thread

i tried , able reproduce it. if generate view resolved without views giving error. there issue in grails jira, see this issue have provided patch it.

hope helps.


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