Pessoal,

Estou lidando com o seguinte erro:

2010-07-05 17:39:09,421 [http-8080-1] ERROR errors.GrailsExceptionResolver - Error executing tag <g:render>: Cannot create a session after the response has been committed at /media/Arquivos/aprendizado/energy_grails/grails-app/views/layouts/main.gsp:13
org.codehaus.groovy.grails.web.taglib.exceptions.GrailsTagException: Error executing tag <g:render>: Cannot create a session after the response has been committed at /media/Arquivos/aprendizado/energy_grails/grails-app/views/layouts/main.gsp:13
at media_Arquivos_aprendizado_energy_grails_grails_app_views_layouts_main_gsp$_run_closure2.doCall(media_Arquivos_aprendizado_energy_grails_grails_app_views_layouts_main_gsp:40)
at media_Arquivos_aprendizado_energy_grails_grails_app_views_layouts_main_gsp$_run_closure2.doCall(media_Arquivos_aprendizado_energy_grails_grails_app_views_layouts_main_gsp)
at media_Arquivos_aprendizado_energy_grails_grails_app_views_layouts_main_gsp.run(media_Arquivos_aprendizado_energy_grails_grails_app_views_layouts_main_gsp:47)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.IllegalStateException: Cannot create a session after the response has been committed
at media_Arquivos_aprendizado_energy_grails_grails_app_views_common__topbar_gsp.run(media_Arquivos_aprendizado_energy_grails_grails_app_views_common__topbar_gsp:19)
... 4 more

A linha onde aparece o erro está no arquivo _topbar.gsp aí vai:

<%@ page contentType=&quot;text/html;charset=UTF-8&quot; %>
<div id=&quot;menu&quot;>
  <nobr>
    <g&#58;if test=&quot;${request.session.usuario}&quot;>
      <!--<b>${session.usuario?.login}&amp;nbsp; - ${session.usuario?.nome}</b> -->
      <g&#58;link controller=&quot;login&quot; action=&quot;auth&quot;>Logout</g&#58;link>
    </g&#58;if>
    <g&#58;else>
      <g&#58;link controller=&quot;login&quot; action=&quot;auth&quot;>Login</g&#58;link>
    </g&#58;else>
  </nobr>
</div>
<br/>

Porque está ocorrendo isso?