Hi,
I got bean like

@Stateful
@Scope(ScopeType.APPLICATION)
@Name("collectionControler")

and collection inside this bean, this constant collection for all users.
When I start serwer, first I set my collection via method.

 public void createLists() {
 if (procentList == null) {
 procentList = new LinkedList<SelectItem>();
 procentList.add(new SelectItem("100", "100%"));
 procentList.add(new SelectItem("90", "90%"));
 procentList.add(new SelectItem("80", "80%"));
 procentList.add(new SelectItem("70", "70%"));
 procentList.add(new SelectItem("60", "60%"));
 procentList.add(new SelectItem("50", "50%"));
 procentList.add(new SelectItem("40", "40%"));
 procentList.add(new SelectItem("30", "30%"));
 procentList.add(new SelectItem("20", "20%"));
 procentList.add(new SelectItem("10", "10%"));
 }
}

and here is my problem. 2 days after serwer start, collection setted null, don't know how?

this is only method where i do anythink with this collection, and don't have any other. Users have acces to this via page like:
<h:selectOneMenu value="#{}" ?

Is any explanation how this could set null?
This problem is not for only one collection, this bean has 4 collections for my app, and when anythink is broken all collections are null.
Maybe somethink destroys my bean?