Let's see, I have a page that receives a parameter, and since I do a query parameter to the database to load a panel, within that panel there is another panel with a AjaxLink, that when you click I want to be replaced by another panel, everything works fine, ie the panel is replaced, but in my traces get a NullPointerException, ie when you update with Ajax, the AjaxRequestTarget, makes a call to the constructor of the page. received additional setting that always puts me is "lib", regardless of the initially received. The problem is that it makes a call to the constructor of the page internally, I do not want it done. My question is why do it? and if you can avoid it to.
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