Map empties itself

[gimpy21]

The problem boils down to a Map<String, ZipCode> (w/about 40k items) in a conversation scoped bean emptying itself.

@Name("zipCodeManager")
@Scope(ScopeType.CONVERSATION)
public class ZipCodeManager implements Serializable
{
     @In(required=false)
     private Session session;
     
     private Map<String, ZipCode> unassigned = new HashMap< String, ZipCode>();
     
     private Map<String, ZipCode> test = new HashMap< String, ZipCode>();
     
     @Create
     public void initialize()
     {
          List<ZipCode> results = session.createQuery("...").list();
          
          for(ZipCode z : results)
               unassigned.put(z.getValue(), z);
          
          test.put("1", new ZipCode("ONE"));
          test.put("2", new ZipCode("TWO"));
          test.put("3", new ZipCode("THREE"));
     }

        public int getAvailableCount()
     {
          System.err.println("zipCodeManager.getAvailableCount() actual: " + unassigned.size());
          System.err.println("zipCodeManager.getAvailableCount() test: " + test.size());
          return test.size();
     }

        <snip methods that do nothing but print the name of the method being called>
}

Calling getAvailableCount() will always have test print 3 but actual can end up emptying itself.

I have two beans that brought this to light. One is mapped to a page and has a dropdown of states. The user selects one and clicks a button. The method the button is tied to calls the proper ZipCodeManager method and all is well. The other bean allows the user to select a state and then the counties within that state. The user selects a state and the county listbox gets updated by an onchange event on the dropdown (calling stateChanged()). The user then selects some counties and clicks the button. Here's the odd part: If I put a call to zipCodeManager.getAvailableCount() within stateChanged(), everything works okay. When removed, the Map count is zero when I get to the method that the button is tied to. Finally, if I change the Map to a List<ZipCode>, it never empties itself.

I'm using Seam 2.0.0.GA, JBoss 4.2, zipCodeManager gets injected into the two beans mentioned above, and this is all in a long running conversation.

Thanks for any help.

[gimpy21]

I should also add that I get the same problem when changing the Map to a Set. Also, if i declare

private SortedMap<String, ZipCode> unassigned = new TreeMap<String, ZipCode>();

Seam will die saying it expects a HashMap.

[gimpy21]

Another piece to the puzzle (or another puzzle perhaps). I go and assign some zip codes to my object as described above (using a List). Works great. Assign a company to my object. Still great. Go back to assign some more zip codes. I now have a List of null entries. The List's size is identical to when I went to assign my company. I have many lists and maps in my project and none of them behave like this. As a note, I don't have any methods that reassign to the list that could mess up and assign nulls.

[gimpy21]

Upgrading to Seam 2.0.1.GA fixed the emptying of both Lists and Maps.