JHeadstart 10.1.2.1: NoSuchElementException in generated JSP

Question

I have generated a jsp with table layout based on a viewobject. In this JSP I can add one new row. If I leave a mandatory field empty I get a message saying the field must have a value (which is correct) and I get a stacktrace in my JSP. This stacktrace only appears when inserting a new row with a invalid value.
Can someone tell me what is causing the stacktrace?
The stacktrace appears in the last cell of the last row (the newly added, invalid row).
java.util.NoSuchElementException
     at java.util.AbstractList$Itr.next(AbstractList.java:426)
     at org.apache.taglibs.standard.tag.common.core.ForEachSupport$SimpleForEachIterator.next(ForEachSupport.java:143)
     at org.apache.taglibs.standard.tag.common.core.ForEachSupport.next(ForEachSupport.java:165)
     at javax.servlet.jsp.jstl.core.LoopTagSupport.doAfterBody(LoopTagSupport.java:301)
     at web2d_inf._page._ReferentietabellenTable._jspService(ReferentietabellenTable.jsp:107)
     [SRC:/WEB-INF/page/ReferentietabellenTable.jsp:24]
     at com.orionserver[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].http.OrionHttpJspPage.service(OrionHttpJspPage.java:56)
     at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:350)
     at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:509)
     at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:413)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:65)
     at oracle.security.jazn.oc4j.JAZNFilter.doFilter(Unknown Source)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:663)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:330)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.ServletRequestDispatcher.forward(ServletRequestDispatcher.java:222)
     at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1069)
     at org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:274)
     at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:455)
     at org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:320)
     at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:279)
     at oracle.jheadstart.controller.strutsadf.JhsRequestProcessor.process(JhsRequestProcessor.java:385)
     at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
     at oracle.jheadstart.controller.strutsadf.JhsActionServlet.process(JhsActionServlet.java:130)
     at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:65)
     at oracle.security.jazn.oc4j.JAZNFilter.doFilter(Unknown Source)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.EvermindFilterChain.doFilter(EvermindFilterChain.java:16)
     at oracle.jheadstart.controller.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:176)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.EvermindFilterChain.doFilter(EvermindFilterChain.java:20)
     at oracle.adf.model.servlet.ADFBindingFilter.doFilter(ADFBindingFilter.java:239)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:659)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:330)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:830)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.HttpRequestHandler.run(HttpRequestHandler.java:285)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].server.http.HttpRequestHandler.run(HttpRequestHandler.java:126)
     at com.evermind[Oracle Application Server Containers for J2EE 10g (10.1.2.0.2)].util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:192)
     at java.lang.Thread.run(Thread.java:534)JSP code:
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html"%>
<%@ include file="/common/taglibs.jsp" %>
<html>
   <head>
      <link rel="stylesheet" type="text/css" href="<c:out value='${requestContextPath}/jheadstart/css/jspStyles.css'/>"/>
<style type="text/css">
        .invisible {display:none;}
        .visible {display:block;}
</style>
   </head>
   <body>
      <jsp:include page="/common/routerForm.jsp" flush="true">
         <jsp:param name="dataFormName" value="ReferentietabellenBean"/>
      </jsp:include>
      <jsp:include page="/common/header.jsp" flush="true"/>
      <jsp:include page="RBSReferentieServiceTabBar.jsp" flush="true">
   <jsp:param name="current" value="Referentietabellen"/>
</jsp:include>
      <jsp:include page="/common/breadcrumbs.jsp" flush="true"/>
      <jsp:include page="/common/jhsInfo.jsp" flush="true"/>
      <html:form name="ReferentietabellenBean" action="ReferentietabellenTable.do"
           type="oracle.jheadstart.view.strutsadf.JhsBindingContainerActionForm" scope="session">
         <jsp:include page="/common/hiddenFormFields.jsp" flush="true"/>
         <jsp:include page="/common/timestamp.jsp" flush="true"/>
         <input type="hidden" name="<c:out value='${bindings.statetokenid}'/>" value="<c:out value='${bindings.statetoken}'/>"/>
       <br>
<jsp:include page="/common/heading1.jsp" flush="true">
   <jsp:param name="key" value="TABLE_TITLE_REFERENTIETABELLEN"/>
</jsp:include>
<c:if test="${bindings.ReferentietabellenIterator.findMode!='true'}">
<table id="tgTable" width="50%">
  <c:set var="rangeStart" scope="request" value="${bindings.ReferentietabellenIterator.rangeStart}"/>
<c:set var="rangeSize" scope="request" value="${bindings.ReferentietabellenIterator.rangeSize}"/>
<c:set var="rowCount" scope="request" value="${bindings.ReferentietabellenIterator.estimatedRowCount}"/>
<jsp:include page="/common/tableScrollButtons.jsp" flush="true"/>
  <tr>
   <td>
     <table id="tgItemsTable" cellpadding="1" cellspacing="0" class="tableForm" width="100%">
      <tr class="header">
   <th id="NaamHeader" class="data">
      <bean:message key="REFERENTIETABELLEN_TABLE_NAAM"/>
   </th>
   <th id="SoortHeader" class="data">
      <bean:message key="REFERENTIETABELLEN_TABLE_SOORT"/>
   </th>
   <th id="OmschrijvingHeader" class="data">
      <bean:message key="REFERENTIETABELLEN_TABLE_OMSCHRIJVING"/>
   </th>
   <th class="fixed">
      <bean:message key="DELETE_COLUMN_HEADER"/>
   </th>
   <th class="fixed"/>
</tr>
<c:set var="ReferentietabellenView1NewRows" value="1" scope="request"/>
<c:forEach var="ReferentietabellenView1" varStatus="status" items="${jhsTableBindings.ReferentietabellenView1.rangeSet}">
   <html:hidden name="ReferentietabellenView1" property="rowKeyStr" indexed="true"/>
   <c:set var="editMode" scope="request" value="${!(status.index ge bindings.ReferentietabellenIterator.rangeSize or status.index ge bindings.ReferentietabellenIterator.estimatedRowCount-bindings.ReferentietabellenIterator.rangeStart) and bindings.ReferentietabellenIterator.currentRowIndexInRange!=-1}"/>
        <tr class="altRow<c:out value="${status.index % 2 + 1 }"/>">
      <c:set var="rowKeyStr" scope="request" value="${ReferentietabellenView1.rowKeyStr}"/>
   <html:hidden name="ReferentietabellenView1" property="ReferentietabellenId" indexed="true"/>
   <td nowrap="nowrap">
      <font class="required">*</font>
      <html:text name="ReferentietabellenView1" property="ReferentietabellenNaam" size="25" maxlength="64" indexed="true"/>
   </td>
   <td nowrap="nowrap">
      <font class="required">*</font>
      <html:select name="ReferentietabellenView1" property="ReferentietabellenSoort" indexed="true">
         <option/>
         <html:option value="G">
            <bean:message key="DOMAIN_REFERENTIETABELLENSOORTDOMAIN_G"/>
         </html:option>
         <html:option value="S">
            <bean:message key="DOMAIN_REFERENTIETABELLENSOORTDOMAIN_S"/>
         </html:option>
      </html:select>
   </td>
   <td nowrap="nowrap">
      <html:text name="ReferentietabellenView1" property="ReferentietabellenOmschrijving" size="50" maxlength="256" indexed="true"/>
   </td>
   <td class="fixed">
      <html:checkbox name="ReferentietabellenView1" property="deleteRow" indexed="true"/>
   </td>
   <td class="fixed" nowrap="true">
      <c:if test="${editMode}">
         <jsp:include page="/common/masterToDetailButton.jsp" flush="true">
            <jsp:param name="key" value="REFERENTIETABELLEN_TO_KOLOMMEN_BUTTON"/>
            <jsp:param name="eventValue" value="Kolommen"/>
         </jsp:include>
         <jsp:include page="/common/masterToDetailButton.jsp" flush="true">
            <jsp:param name="key" value="REFERENTIETABELLEN_TO_RIJEN_BUTTON"/>
            <jsp:param name="eventValue" value="Rijen"/>
         </jsp:include>
      </c:if>
   </td>
        </tr>
      </c:forEach>  
     </table>
    </td>
   </tr>
</table>
</c:if> 
        <table id="fbTable">
          <tr>
            <td align="center" valign="bottom" height="40px">
              <jsp:include page="/common/saveButton.jsp" flush="true">
   <jsp:param name="saveKey" value="SAVE_BUTTON_LABEL_REFERENTIETABELLEN"/>
</jsp:include>
            </td>
          </tr>
        </table>        
      </html:form>
      <jsp:include page="/common/footer.jsp" flush="true"/>
   </body>
</html>

Answer 1

I am now getting this issue also in another JSP. It occurs in this JSP when I fill in a wrong value so that a exception is raised on the backend (database) which is catched on the middletier. There a JBO exception is raised. That's all okay, but at the end of the forEach loop in my JSP suddenly the stacktrace appears!
It looks like the iterator contains a invalid element which is created (or not cleared correctly?) when an error occurred.
I have also tried to catch this exception in the JSP and ignore it (dirty, I know), but in that case the next navigation in the page leads to a classcastException in the routerform.jsp and this one could only be solved by restarting OC4J! So that's not really a workaround.
Does anyone else have a suggestion I can try?
Hint: Maybe related with this problem: I also see that sometimes a row is shown twice in the jsp. This only happens after entering a wrong value at creation time, then fill in the right value and commit and only in certain occasions. Then navigate back via the breadcrumbs and voila, two rows instead of one. After a requery the correct rows are shown.