java - h:message elements with for attribute do not present messages in JSF 2 -

i have following authentication form in jsf running on glassfish 3:

<h:messages globalonly="true" errorclass="erro" /> <h:form id="form-login">     <h:outputtext value="user" />     <h:message for="login-user" />     <h:inputtext id="login-user"          value="#{authenticationbean.user}" showmessages="true" />      <h:outputtext value="password" />     <h:inputsecret id="login-password"          value="#{authenticationbean.password}" />      <h:commandbutton id="log in"          action="#{authenticationbean.login}" value="autenticar-se" /> </h:form> 

the authentication.login method 1 below:

public string login() {     user = userdao.authenticate(user, password);     if (user != null) {         facesmessage message = new facesmessage("welcome!");         message.setseverity(facesmessage.severity_info);         facescontext.getcurrentinstance().addmessage(null, message);         return "ok";     } else {         facesmessage message = new facesmessage("authentication failed");         message.setseverity(facesmessage.severity_error);         facescontext.getcurrentinstance().addmessage(null, message);         if ("".equals(user)) {             message = new facesmessage("you need give user");             message.setseverity(facesmessage.severity_error);             facescontext.getcurrentinstance().addmessage(                 "login-user", message);         }         return "fail";     } } 

i try show specific message if user login not given, line <h:message for="login-user" />. not work, though: if click in submit button empty user field, <h:messages globalonly="true" errorclass="erro" /> element presents "authentication failed" <h:message for="login-user" /> component not present "you need give user" text expected. instead presents no message @ all. also, following warning appears on log:

[lifecycle] warning: facesmessage(s) have been enqueued, may not have been displayed. sourceid=login-user[severity=(error 2), summary=(you need give user), detail=(you need give user)] 

(actually, looked translation in google, since real message got in portuguese:

info: warn: facesmessage(s) foram enfileirados, mas podem não ter sido exibidos. sourceid=login-usuario[severity=(error 2), summary=(you need give user), detail=(you need give user)] 

)

what doing wrong?

thanks in advance!

you need specify client id, not component id. based on given view code, that'll be:

facescontext.getcurrentinstance().addmessage(     "form-login:login-user", message); 

if doesn't work, need open page in browser , view generated html source. should same id attribute of generated html <input> element.

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unrelated problem, use null client id , use <h:messages globalonly="true"> general validation errors. may want take same approach. "you need give user" part i'd use required="true" instead.