Que warning é esse?

Bom dia senhores.

estou fazendo uma aplicaçao usando:
JSF e Richfaces
no GlassFish

sempre recebo esse tipo de mensagem:

PWC4011: Unable to set request character encoding to UTF-8 from context /myJavaWebAplication, because request parameters have already been read, or ServletRequest.getReader() has already been called

vi na net isso:
This warning message means that the web container is complaining about the fact that the web application deployed at /your_webapp is trying to set the request encoding too late in the request’s lifecycle, when it is impossible for the container to honor it.

entao… alguem ja passou por isso? como resolvo isso ?

obrigado