jsf - There are some unhandled FacesMessages, this means not every FacesMessage had a chance to be rendered

Question

I have a JSF 2.1 + PrimeFaces 3.3 page:

<h:form id="particluar">
  <p:message id="msg" globalOnly="true" display="text"/>

  <h:panelGrid columns="2" id="test">
    <h:panelGrid id="panel2" columns="3">
      <p:inputText id="name1" value="Student.studentID" required="true"/>          
      <p:commandButton value="Check Name" actionListener="#{Student.abc}" process="name1" update="panel2" />
      <p:message id="msg1" for="name1" display="text"/>
    </h:panelGrid>

    <p:inputText id="name2" required="true"/>
    <p:message id="msg2" for="name2" display="text"/>

    <p:inputText id="name3" required="true"/>
    <p:message id="msg3" for="name3" display="text"/>

  </h:panelGrid>
  <p:commandButton value="submit" actionListener="#{Student.xyz}" update="particluar" />
</h:form>

I'm trying to manually add faces messages when the name is invalid:

public void xyz() {
  if (name1.equals("primefaces")) {
    FacesContext.getCurrentInstance().addMessage("msg1", new FacesMessage(FacesMessage.SEVERITY_ERROR,"Invalid Name", "Invalid Name"));
  }
  if (name2.equals("primefaces")) {
    FacesContext.getCurrentInstance().addMessage("msg2", new FacesMessage(FacesMessage.SEVERITY_ERROR,"Invalid Name", "Invalid Name"));
  }
  if (name3.equals("primefaces")) {
    FacesContext.getCurrentInstance().addMessage("msg3", new FacesMessage(FacesMessage.SEVERITY_ERROR,"Invalid Name", "Invalid Name"));
  }
}

But they do not show up and the server log keeps printing the following warning:

There are some unhandled FacesMessages, this means not every FacesMessage had a chance to be rendered

How do I show them in the page?

And, a second question, if I submit the form with three empty input fields, it shows "required input error message" in each <p:message> associated with the <p:inputText>. How do I show them in the <p:message globalOnly="true">?

Answer 1

How do I show them in the page?

You need to specify a valid client ID. The client ID is not the same as component ID. The client ID is whatever you see in the JSF-generated HTML output. Also, the client ID should be the one of the input component, not of the message component.

So, given a

<h:form id="particular">
    <p:inputText id="name1" />
    <p:message id="msg1" for="name1" />
</h:form>

the input component has the client ID particular:name1 (rightclick page in browser and do View Source to see it yourself). So, the message should be attached on exactly this client ID.

context.addMessage("particular:name1", message);

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And, a second question, if I submit the form with three empty input fields, it shows "required input error message" in each <p:message> associated with the <p:inputText>. How do I show them in the <p:message globalOnly="true">?

The <p:message> is not the valid component for that, you should use <p:messages>.

<p:messages id="msg" globalOnly="true" display="text"/>

The globalOnly="true" attribute means that only messages with a null client ID will be shown. So, you should just add exactly such a message.

context.addMessage(null, message);

See also:

• How to use JSF h:messages better?
• When and how is clientID generated in JSF?

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Unrelated to the concrete problem, the non-global messages ("Invalid name") which you're trying to add there should actually be done by a fullworthy validator. See also How to perform validation in JSF, how to create a custom validator in JSF for a concrete example.