richfaces - rich:fileupload in rich:popupPanel fails first time, in a large page -

i have rich:datatable , bunch of buttons @ bottom of xhtml. use 1 of buttons show rich:popuppanel upload file. separated rich:popuppanel rich:fileupload different forms based on earlier suggestions.

1st form:

<h:form id="form" enctype="multipart/form-data">     <h:panelgrid columns="1" columnclasses="valign">          <rich:messages/>          <rich:panel style="width:1100px;">                               <f:facet name="header">                 <h:outputtext value="mrm segments" />             </f:facet>              <rich:datatable value="#{couponcontroller.campaignsegmentdtolist}"                 var="campaignsegment" id="sas" rowclasses="odd-row, even-row"                 styleclass="stable" sortmode="single" rowkeyvar="myrow" onrowclick="myfunction()">                  <rich:column>                     <f:facet name="header">no</f:facet>                     <h:outputtext value="#{myrow + 1}" />                 </rich:column>                  <!-- snipped -->              </rich:datatable>              <script>                 //<![cdata[                 function updatenumbers() {                     var = document.getelementbyid('form:sas:tb');                     (var i=0; < a.children.length; i++) {                         a.children[i].children[0].innerhtml = + 1;                     }                 }                    //]]>             </script>              <a4j:outputpanel ajaxrendered="true">                 <rich:popuppanel id="confirmpanestatus" autosized="true" header="confirm">                     <table border="0" cellspacing="0" cellpadding="0">                         <tr><td colspan="3">are sure want set                             segments numeric names inactive ?</td></tr>                         <tr><td colspan="3"><br/></td></tr>                         <tr><td align="right">                             <a4j:commandbutton value="cancel" onclick="#{rich:component('confirmpanestatus')}.hide(); return false;" />                         </td><td align="left">                             <a4j:commandbutton value="update" onclick="#{rich:component('confirmpanestatus')}.hide(); updatestatus(); return false;" style="margin-left:15px"/>                         </td></tr>                       </table>                 </rich:popuppanel>             </a4j:outputpanel>              <a4j:outputpanel ajaxrendered="true">                 <rich:popuppanel id="errorpane" autosized="true" header="error" >                     <table border="0" cellspacing="0" cellpadding="0">                         <tr><td colspan="3">only .xlsx files accepted</td></tr>                         <tr><td colspan="3"><br/></td></tr>                         <tr><td align="right">                             <a4j:commandbutton value="close" onclick="#{rich:component('errorpane')}.hide();" />                         </td></tr>                       </table>                 </rich:popuppanel>             </a4j:outputpanel>                                                                            <a4j:jsfunction name="updatestatus"                 action="#{couponcontroller.updatecampaignsegmentdtolistwithsegmentstatus()}"                 render="sas" immediate="true"/>             <a4j:jsfunction name="sort" oncomplete="updatenumbers()" />          </rich:panel>     </h:panelgrid>      <h:panelgrid columns="7">         <a4j:commandbutton value="apply segment type"  render="sas"             action="#{couponcontroller.updatecampaignsegmentdtolistwithsegmenttype()}"             execute="@form" style="width:140px;height:30px;"/>         <a4j:commandbutton value="apply segment status" render="sas"             execute="@form" style="width:150px;height:30px;">             <rich:componentcontrol target="confirmpanestatus" operation="show"/>         </a4j:commandbutton>         <a4j:commandbutton value="upload segment names" execute="@none"              style="width:160px;height:30px;">             <rich:componentcontrol target="uploadsegmentnames"                 operation="show" />         </a4j:commandbutton>         <a4j:commandbutton value="save"  render="sas"             action="#{couponcontroller.savecampaignsegmentsreadytopublish()}"              execute="@form" style="width:78px;height:30px;"/>         <a4j:commandbutton value="publish"  render="sas"             action="#{couponcontroller.publishcampaignsegmentsreadytopublish()}"             execute="@this" style="width:78px;height:30px;"/>         <a4j:commandbutton value="re-publish"  render="sas"             action="#{couponcontroller.republishcampaignsegmentsreadytopublish()}"             execute="@this" style="width:78px;height:30px;"/>         <h:commandbutton onclick="location.href='campaignsversions.jsf';return false;"             value="cancel" style="width:78px;height:30px;"></h:commandbutton>     </h:panelgrid>      <rich:popuppanel id="statpane" autosized="true">         <h:graphicimage value="/images/please_wait.gif" alt="pw" />         please wait...     </rich:popuppanel>      <script type="text/javasript">         $(window).load(function() {             // animate loader off screen             $(".statpane").fadeout("slow");;         });     </script> </h:form> 

2nd form:

<h:form id="uploadform" enctype="multipart/form-data">     <a4j:outputpanel ajaxrendered="true">         <rich:popuppanel id="uploadsegmentnames" modal="true" autosized="true"              header="upload names file" domelementattachment="parent">              <rich:messages/>             <rich:panel style="width:400px;height:300px;">                 <table border="0" cellspacing="0" cellpadding="0">                     <tr>                         <td colspan="3">                             <rich:fileupload id="upload" acceptedtypes="xlsx"                                 fileuploadlistener="#{couponcontroller.fileuploadlistener}"                                  immediateupload="true" maxfilesquantity="1"                                 ontyperejected="#{rich:component('errorpane')}.show();"                                 style="width:370px" addlabel="choose file"                                  donelabel="upload complete" execute="@none"                                 servererrorlabel="error, please close upload window , try again">                              </rich:fileupload>                         </td>                     </tr>                     <tr><td colspan="3"><br/></td></tr>                  </table>             </rich:panel>             <h:panelgrid columns="2" style="width:400px;height:20px;" align="right">                 <h:panelgrid columns="1" border="0" style="width:260px;height:20px"/>                  <h:panelgrid columns="2" border="0">                     <a4j:commandbutton value="process" id="process"                         action="#{couponcontroller.processfile}" render="sas"                         onclick="#{rich:component('uploadsegmentnames')}.hide();"                         execute="@form" />                     <a4j:commandbutton value="cancel" execute="@none"                         onclick="#{rich:component('uploadsegmentnames')}.hide();" />                 </h:panelgrid>             </h:panelgrid>          </rich:popuppanel>     </a4j:outputpanel> </h:form> 

table having 10 row or 350 rows or in between. problem when table big, upload fails first time. if close upload popup , try again. works. happening big table. appreciate help.

i'm using tomcat 7 , richfaces 4.5.1.

solved. bigger table, bigger viewstate calculated. noticed debugging upload xmlhttprequest url , comparing both cases (with small table , large table). increasing maxhttpheadersize 65536 solved issue. state saving method 'client'.