jsf - How to send a custom FacesMessage to page when the clientId is not actually present -

i using jsf 2.2 on glassfish 4.

i want send messages <h:message .../> tag.

for below login page, want send custom facesmessage on login failure clientid login-error userbean.

my login.xhtml:

<h:form id="login-form">     <table>         <tr>             <td><h:outputlabel value="username" for="username" /></td>             <td><h:inputtext id="username" value="#{userbean.username}" /></td>         </tr>         <tr>             <td><h:outputlabel value="password" for="password" /></td>             <td><h:inputsecret id="password" value="#{userbean.password}" /></td>         </tr>         <tr>             <td></td>             <td><h:commandbutton value="submit" action="#{userbean.login()}" /></td>         </tr>     </table>     <div>         <h:message for="login-error" errorclass="err" />     </div> </h:form> 

my userbean:

@named @sessionscoped public class userbean implements serializable {     . . .      public string login() {         if (validate(username, password)) {             return "/success?faces-redirect=true";         }         facescontext ctx = facescontext.getcurrentinstance();         string msgtext = "username or password incorrect";         facesmessage msg = new facesmessage(facesmessage.severity_error, msgtext, msgtext);         ctx.addmessage("login-error", msg );         return "";     }  } 

i below messages in server console:

2017-04-14t21:43:02.298+0530|warning: unable find component id login-error in view. 2017-04-14t21:43:04.923+0530|warning: unable find component id login-error in view. 2017-04-14t21:43:04.923+0530|info: warning: facesmessage(s) have been enqueued, may not have been displayed. sourceid=login-error[severity=(error 2), summary=(username or password incorrect), detail=(username or password incorrect)] 

i've tried using clientid login-form:login-error didn't work.

so, question how send custom facesmessage page when clientid not present? approach incorrect?

i know can use <h:messages /> instead don't want use it.