Bom dia, vaguei pela net e não achei algo que explicasse o que acontece de errado..

tenho esse código que tem em toda parte:

Controller:
if(request instanceof MultipartHttpServletRequest)
{
MultipartHttpServletRequest mpr = (MultipartHttpServletRequest)request;
CommonsMultipartFile f = (CommonsMultipartFile) mpr.getFile("doc1");
if(!f.empty)
render "success" + f.size
else
render "empty"
}
else{
render "fail"
}

view:

<g:uploadForm name="myForm" action="importar" method="post" enctype="multipart/form-data">
<input type="file" name="doc1" value=""/>
<g:actionSubmit value="Importar"/>
</g:uploadForm>


Ele funciona normal usando o "run-app", porem... quando passo para .war e implanto(importo) no GlassFish3, ele reclama que o objeto (file) é null..


Error 500: Internal Server Error
URI
/xxxxxxx/yyyyyy/importar
Class
java.lang.NullPointerException
Message
Cannot get property 'empty' on null object
Trace
Line | Method
->> 35 | importar in ttttttt.XxxxxxController
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 317 | call in com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable
| 195 | service . . . . . . . in com.sun.enterprise.v3.services.impl.ContainerMapper
| 849 | invokeAdapter in com.sun.grizzly.http.ProcessorTask
| 746 | doProcess . . . . . . in ''
| 1045 | process in ''
| 228 | execute . . . . . . . in com.sun.grizzly.http.DefaultProtocolFilter
| 137 | executeProtocolFilter in com.sun.grizzly.DefaultProtocolChain
| 104 | execute . . . . . . . in ''
| 90 | execute in ''
| 79 | execute . . . . . . . in com.sun.grizzly.http.HttpProtocolChain
| 54 | doCall in com.sun.grizzly.ProtocolChainContextTask
| 59 | call . . . . . . . . in com.sun.grizzly.SelectionKeyContextTask
| 71 | run in com.sun.grizzly.ContextTask
| 532 | doWork . . . . . . . in com.sun.grizzly.util.AbstractThreadPool$Worker
| 513 | run in ''
^ 722 | run . . . . . . . . . in java.lang.Thread


Alguem sabe dizer se o problema é no glassfish.. grails.. código..

Obrigado.