Spurious valueChangeListener calls on same JSP page

[jack catler]

I have a number selectOneListbox items on the same JSP page.

They are logically connected in a tree type structure, selecting list A will fill list B, selecting list B will fill list C and so on. I also clear the lists as required.

Each list has a Listener handler valueChangeListener which performs a number of actions:
- Gets the new value.
- clears the current list.
- Updates the lists based on the selection.

Works OK 50% of the time but then depending on sequence (and luck/timing?), some selections of list items (up the tree) cause the valueChangeListener events of other lists to be fired with null/unselected values. I have done some searching and I believe it's a timing issue but thats all I can determine. I am quite new JSF...


Example of the list declerations follows...

<tr><td>List A</td></tr>
<tr><td>
<h:selectOneListbox immediate="true" onchange="submit()"valueChangeListener="#{myclass.listAChanged}">
<f:selectItems value="#{myclass.listA}" />
</h:selectOneListbox>
</td></tr>

<tr><td>List B</td></tr>
<tr><td>
<h:selectOneListbox immediate="true" onchange="submit()"
valueChangeListener=" {myclass.listBChanged}">
<f:selectItems value="#{myclass.listB}" />
</h:selectOneListbox>
</td></tr>

<tr><td>List C</td></tr>
<tr><td>
<h:selectOneListbox immediate="true" onchange="submit()"
valueChangeListener="#{myclass.listCChanged}">
<f:selectItems value="#{myclass.listC}" />
</h:selectOneListbox>
</td></tr>

Example of valueChangeListener follows...

public void listAChanged(ValueChangeEvent event){

FacesContext fc = getFacesContext();
String newAString = (String)event.getNewValue();

// listB is a Map object...
listB = getNewBList(newAString);
listC.clear();


fc.renderResponse();
}


When I play around with the list selection screen I get (without explanation) null events or events that refer to lower lists (say listC) without even having selected them...it is kinda driving me el nutso...

Any tips greatly appreciated.

Thanks

[Julien Martin]

Did you find a solution to your problem?
I have the same problem (i.e. several value change listener methods) and would be grateful for your help?
Julien.