Richfaces数据表分页中的渲染问题

Question

状态有一个下拉列表，应根据该下拉列表更改数据表中的记录。我在页面选择的分页中还有另一个下拉列表。 当分页的下拉菜单发生变化时，将进行ajax调用，该调用将转到bean并获取结果并更新数据表。每页显示10条记录。

问题是，当我选择一个有30条记录的州，然后从分页的下拉菜单中选择第二页时，它可以正常工作， 但是如果我选择另一个只有7条记录的州，然后从分页的下拉菜单中选择第二页 然后数据表变成空白，并且之后ajax也停止工作。

代码如下：

<div align="left" style="width:99%">
<!-- PAGING CODE - START -->
  <rich:datascroller align="top" fastControls="hide" for="data" 
  maxPages="15" 
  page="#{courtSessionBean.pageNo}" reRender="sc2" id="sc1" 
  actionListener="#{courtSessionBean.scrollEvent}" 
  rendered="#{courtSessionBean.totalPages > 1}">

    <%@include file="/jsp/include/NavigationControls.jsp" %>

    <f:facet name="pages">
        <h:panelGroup>
            <x:dataList itemStyleClass="odd" style="odd" var="page" 
             value="#{courtSessionBean.pageList}">
                <h:commandLink action="#{courtSessionBean.search}" 
                  rendered="#{pagingView.currentPageNo!=page}">
                    <h:outputText value="#{page}"></h:outputText>
                        <f:param name="PAGE_NO" value="#{page}"></f:param>
                        <f:param name="orderBy" 
                         value="#{courtSessionBean.orderBy}"></f:param>
                        <f:param name="orderType" 
                         value="#{courtSessionBean.orderType}"></f:param>
                </h:commandLink>
                <h:outputText value="#{page}" rendered="#{pagingView.currentPageNo==page}"></h:outputText>
                <h:outputText value=" " />
            </x:dataList>
            <h:outputText value=" Page " />

            <h:selectOneMenu value="#{courtSessionBean.pageNo}">
                <a4j:support reRender="sc1,sc2,data" event="onchange" actionListener="#{courtSessionBean.search}"></a4j:support>
                <f:selectItems value="#{courtSessionBean.pages}" />
            </h:selectOneMenu>

            <h:outputText value=" / #{courtSessionBean.totalPages}" />
            <h:outputText value=" " />

        </h:panelGroup>
    </f:facet>

</rich:datascroller>
<!-- PAGING CODE - END -->
</div>

<div style="width:99%">
<x:dataTable width="100%" rowClasses="even,odd" styleClass="table" first="0" 
rows="10" cellpadding="0" cellspacing="0" id="data" value="# 
{courtSessionBean.tableModel}" binding="#{courtSessionBean.table}" 
var="sessionheader">            
    <h:column rendered="#{courtSessionBean.orderType=='ASC' && 
courtSessionBean.orderBy=='CSH.AGENCYNAME'}" >
        <f:facet name="header">
            <h:commandLink action="#{courtSessionBean.search}">
                <h:graphicImage url="# 
{facesContext.externalContext.requestContextPath}/../images/sort_asc.gif" />
                <f:param name="orderType" value="DESC"></f:param>
                <f:param name="orderBy" value="CSH.AGENCYNAME"></f:param>
                <f:param name="PAGE_NO" value="#{courtSessionBean.pageNo}"> 
</f:param>
                <h:outputText value="#{bundle.courtsession_agency}" 
escape="false"/>
            </h:commandLink>
        </f:facet>
        <h:outputText value="#{sessionheader.agencyName}" />
    </h:column>             

</x:dataTable>              
</div>

<div style="width:99%">
    <x:dataTable width="100%" rowClasses="even,odd" styleClass="table" first="0" rows="10" cellpadding="0" cellspacing="0" id="data" value="#{courtSessionBean.tableModel}" binding="#{courtSessionBean.table}" var="sessionheader">            
        <h:column rendered="#{courtSessionBean.orderType=='ASC' && courtSessionBean.orderBy=='CSH.AGENCYNAME'}" >
            <f:facet name="header">
                <h:commandLink action="#{courtSessionBean.search}">
                    <h:graphicImage url="#{facesContext.externalContext.requestContextPath}/../images/sort_asc.gif" />
                    <f:param name="orderType" value="DESC"></f:param>
                    <f:param name="orderBy" value="CSH.AGENCYNAME"></f:param>
                    <f:param name="PAGE_NO" value="#{courtSessionBean.pageNo}"></f:param>
                    <h:outputText value="#{bundle.courtsession_agency}" escape="false"/>
                </h:commandLink>
            </f:facet>
            <h:outputText value="#{sessionheader.agencyName}" />
        </h:column>             

    </x:dataTable>              
</div>

<!-- PAGING CODE - START -->
<div align="left" style="width:99%"> 
<rich:datascroller align="top" for="data" maxPages="15" page="#{courtSessionBean.pageNo}" reRender="sc1" fastControls="hide" 
    id="sc2" actionListener="#{courtSessionBean.scrollEvent}" rendered="#{courtSessionBean.totalPages > 1}">
<%@include file="/jsp/include/NavigationControls.jsp" %>
    <f:facet name="pages">
        <h:panelGroup>
            <x:dataList itemStyleClass="odd" style="odd" var="page" value="#{courtSessionBean.pageList}">
                <h:commandLink action="#{courtSessionBean.search}" rendered="#{pagingView.currentPageNo!=page}">
                    <h:outputText value="#{page}"></h:outputText>
                    <f:param name="PAGE_NO" value="#{page}"></f:param>
                    <f:param name="orderBy" value="#{courtSessionBean.orderBy}"></f:param>
                    <f:param name="orderType" value="#{courtSessionBean.orderType}"></f:param>
                </h:commandLink>
                <h:outputText value="#{page}" rendered="#{pagingView.currentPageNo==page}"></h:outputText>
                <h:outputText value=" " />
            </x:dataList>                                               
        </h:panelGroup>
    </f:facet>
</rich:datascroller>
<!-- PAGING CODE - END -->  
<f:subview id="noRecordFound" rendered="#{courtSessionBean.totalRows==0}">
    <div class="odd" style="width:100%" align="center">                 
        <b><h:outputText value="#{bundle.note_noRecordsFound}" /></b>
    </div>
</f:subview>
</div>