1 on GlassFish v3. xhtml page, but the previous error message is repeated in the new page. You either display an icon with the default message in a tooltip or. JSF 2 custom validation – Email validation ERROR. project xmlns = " http: / / maven. 0" xmlns: xsi = w3. org/ / XMLSchema- instance". display- name > JSF 2 Form Email Validation example< / display- name >.