This one drives me crazy! If there's a list box backed by an EntityQuery, on the same page with an AJAX component (in my case it's RichFaces DataScroller/DataTable), then after several AJAX requests, the resultList for EntityQuery contains a list of nulls. It looks like every entity in the resultList is replaced with a null. I'm not sure whether it's Seam or RichFaces, but it's bound to be one or the other. Anyway, here's the setup: Seam 2 GA, RichFaces 3.1.2, Facelets 1.1.14, JSF RI 1.2.05, Hibernate 3.2.5 GA. The entites A and B are identical in structure (though they can be different, for as much as this bug cares): @Entity | public class A implements Serializable { | @Id | private String name; | | public String getName() { | return name; | } | } The EntityQuery's: <core:init debug="false" /> | <core:manager conversation-timeout="120000" concurrent-request-timeout="500" /> | <persistence:entity-manager-factory name="testDatabase" /> | <persistence:managed-persistence-context name="entityManager" | entity-manager-factory="#{testDatabase}" auto-create="true" /> | <transaction:entity-transaction entity-manager="#{entityManager}" /> | <framework:entity-query name="listOfA" scope="conversation" ejbql="FROM A a" order="name" /> | <framework:entity-query name="listOfB" scope="conversation" ejbql="FROM B b" order="name" /> | <security:identity authenticate-method="#{authenticator.authenticate}" /> | <web:ajax4jsf-filter force-parser="false" enable-cache="true" class="org.ajax4jsf.FastFilter" /> Now, the Facelets page: <h:form xmlns="http://www.w3.org/1999/xhtml" | xmlns:h="http://java.sun.com/jsf/html" xmlns:f="http://java.sun.com/jsf/core" | xmlns:s="http://jboss.com/products/seam/taglib" xmlns:r="http://richfaces.org/rich"> | <r:dataTable id="list" var="a" value="#{listOfA.resultList}" rows="4"> | <r:column> | <h:commandLink action="Dummy" value="#{a.name}" /> | </r:column> | </r:dataTable> | <r:datascroller align="left" maxPages="1" for="list" fastControls="auto" /> | <br /> | <h:selectOneMenu value="#{notImportantHere}"> | <s:selectItems value="#{listOfB.resultList}" var="b" label="#{b.name}" noSelectionLabel="Select one..." /> | <s:convertEntity /> | </h:selectOneMenu> | </h:form> Pretty simple - there's a scrollable datatable for entity A, and a dropdown for entity B. Now, when user activates the datascroller twice, and then selects an A from the data table, the list of Bs is empty - it contains the same # of entries as before, but they are all empty. Has anyone ever encountered such behavior before? Is this a bug? I myself have seen it before, with a different AJAX component (it was a RichFaces suggestion box that time), but dismissed it on the notion that "what else could you expect from a beta" (Seam was B2 at the time)? Thanks in advance, Alex View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4102676#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...