title: JSF skips phases - How to debug that?
body: <p>I'm debugging a foreign JSF application.
  The problem is, that I submit a form, but the values aren't carried over.</p>
  
  <p>With a phase listener I can see, that the life cycle doesn't run completely through, so to say it skips phase 2 -5: After the restore view phase, the render response phase is directly called. I miss the apply values, validation, update model actions and so on.</p>
  
  <p>So, this could be a chicken-and-egg problem:
  1. The responsible phases aren't called, so the new form input can't be carried over.
  2. The system doesn't recognize any new input and therefore directly renders after restoring the view.</p>
  
  <p>I checked that there is no call of responseComplete() oder renderResponse().</p>
  
  <p>I'm stuck somehow. Any idea to validate one of the two hypothesis? Or how to debug that in general? Did anybody have a similar problem?</p>
  
  <hr>
  
  <h2>Update</h2>
  
  <p>I have a suspicion, that JSF isn't aware of the <em>postback request</em> and handles this like an <em>initial view</em>. That would explain, that I only pass phase 1 &amp; 6.</p>
  
  <p>How can I check, if JSF recognizes this as a <em>non-faces-request</em>?<br>
  How can I check, if there is the appropriate <em>treeID</em> in the current <code>facesContext</code>.</p>