Working with JSF & MyFaces ; java.lang.IllegalStateException: Client-id : xxx is duplicated in the faces tree. If you're working with JSF using Myfaces nad Tomahawk, and you are getting a stacktrace like this, you have probably just changed the internal structure of your JSP page. For some strange reason, that doesn't work too well in all cases.

What you need to do, is to make sure a new browser session is started, and access the page again.

java.lang.IllegalStateException: Client-id : xxx is duplicated in the faces tree. Component : _idJsp0:minus, path: {Component-Path : [Class: javax.faces.component.UIViewRoot,ViewId: /cars/default/jsp/agreement/bets/doors/viewd........  ¶ 3:48 AM