java - getting always 500 failed to load resources Spring -


i have jsp use spring form tags , work fines until before. had changed things in jsp , controller , started continuously getting 500 server error , no related log show error , on console. don't understand caused error , upon wasted time , feel required here.

my pojo

public class transferinvoiceform { private list<transferinvoice> trinvoicelist; //getters , setters 

my controller method @controller @requestmapping("/asset/invoice")

   //some other methods here  @requestmapping(value ="transferinvoicehdrform", method = requestmethod.get) protected modelandview showform(final httpservletrequest request, final httpservletresponse response)throws exception {           transferinvoiceform transferinvoice = new transferinvoiceform();         list<transferinvoice> transferinvoice= transferinvoicehdrservice.getassetcategoriesandtransfer();         transferinvoice.settrinvoicelist(transferinvoice);      return new modelandview("asset/transferinvoicehdrform", "transferinvoice", transferinvoice); } 

and in jsp

<form:form method="post" action="/asset/invoice/searchctr" modelattribute="transferinvoice">              <fieldset>                      <form:select path="trinvoicelist" class="col-xs-12 col-lg-5 form-group">                      <form:option value="0" selected="true">all</form:option>                      <c:foreach var="transferinvoicetype" items="${transferinvoice.trinvoicelist}">                             <form:option value="${transferinvoicetype.assetname}"></form:option>                     </c:foreach>                     </form:select>                     <form:select path="trinvoicelist" class="col-xs-12 col-lg-5 form-group">                      <form:option value="0" selected="true">all</form:option>                      <c:foreach var="transferinvoicetype" items="${transferinvoice.trinvoicelist}">                             <form:option value="${transferinvoicetype.assettolocation}"></form:option>                      </c:foreach>                     </form:select>                      <button class="btn btn-primary" type="submit" class="col-xs-12 col-lg-6 form-group">                         <fmt:message key="button.search" />                     </button>             </fieldset>          </form:form> 

and in other jsp

<form:form method="post" action="/asset/invoice/transferinvoiceconfirm" modelattribute="transferinvoice">         <c:foreach items="${transferinvoice.trinvoicelist}" var="invoice" varstatus="status">         </c:foreach>         <table id="assets-tbl" border="1"             class="table table-bordered table-hover table-striped">             <thead>                 <tr>                     <th><input id="selectall" type="checkbox" value=""></th>                     <th><fmt:message key="asset.scancode.serialno" /></th>                     <th><fmt:message key="asset.modelno"/></th>                     <th><fmt:message key="asset.name" /></th>                     <th><fmt:message key="asset.invoice.tolocation" /></th>                     <th><fmt:message key="asset.invoice.invoicedate" /></th>                 </tr>             </thead>             <tbody id="assets-tbl-body" >                                     <tr>                         <td><form:checkbox path="trinvoicelist[${status.index}].check"/></td>                         <td><form:hidden path="trinvoicelist[${status.index}].scanserialcode"/>${invoice.scanserialcode}</td>                         <td><form:hidden path="trinvoicelist[${status.index}].modelnum"/>${invoice.modelnum}</td>                         <td><form:hidden path="trinvoicelist[${status.index}].assetname"/>${invoice.assetname}</td>                         <td><form:hidden path="trinvoicelist[${status.index}].assettolocation"/>${invoice.assettolocation}</td>                         <td><form:hidden path="trinvoicelist[${status.index}].actualtransferdate"/>${invoice.actualtransferdate}</td>                     </tr>             </tbody>         </table>         <div class="panel-footer">         <div class="row">             <div class="col-lg-7 col-sm-offset-5">                 <input class="btn btn-primary" type="submit" value="confirm">             </div>         </div>     </div>         </form:form> 

and controller method called

 <a href='<c:url value="/asset/invoice/transferinvoicehdrform" />' style="float: right"> 

looking help. thanks


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