Batch Request error in Update for multiple row giving 500 error response

Dear Experts /Claudia Pacheco/Jitendra Kansal/ Midhun VP - SCN Member of the Month May 2014Jitendra Kansal,

     I am facing a problem when I am trying to push multiple rows for Update operation into a single request. I am using Batch request, for multiple data its not working for me, below are the code I am using for Update Operation . Please suggest for the same.

NOTE : When I update single row same code is working for me but for multiple files same code not woking giving error with ERROR Code 500.

   public static String updateReassignLeadBatch(ArrayList<ReassignBean> leadData, String userCode) throws OfflineODataStoreException {

  String code = "";

   if (createOfflineStore == null)

   return "";

   try {

   //Creates the entity payload

     // //Note: headers may not be required... test with and without it in case of issues
   Map<String, String> createHeaders = new HashMap<String, String>();

  createHeaders.put("accept", "application/atom+xml");

  createHeaders.put("content-type", "application/atom+xml");

   ODataRequestParamBatch RequestParamBatch = new ODataRequestParamBatchDefaultImpl();

  ODataRequestChangeSet updateLead = new ODataRequestChangeSetDefaultImpl();

  ODataEntity newEntity = new ODataEntityDefaultImpl("AppModel.user_RetailData");

  newEntity.getProperties().put("USER_Code", new ODataPropertyDefaultImpl("\"USER_Code\"", userCode));

  ODataRequestParamSingle batchItem = null;

   for (int i = 0; i < leadData.size(); i++) {

   //Creating Batch Item
   batchItem = new ODataRequestParamSingleDefaultImpl();

 
   batchItem.setResourcePath("user_RetailData(" + leadData.get(i).regCode + "L)");

  batchItem.setMode(ODataRequestParamSingle.Mode.Update);

  batchItem.setCustomTag("Batch Request to Update");

  batchItem.setPayload(newEntity);

  batchItem.setOptions(createHeaders);

   //Creting Batch Set


   updateLead.add(batchItem);

  RequestParamBatch.add(updateLead);

  }

  ODataResponse dataResponse = createOfflineStore.executeRequest(RequestParamBatch);

  Map<ODataResponse.Headers, String> headerMap = dataResponse.getHeaders();

   if (headerMap != null) {

  code = headerMap.get(ODataResponse.Headers.Code);

  }

  } catch (Exception e) {

// System.out.println("Record create func in exception");

   throw new OfflineODataStoreException(e);

  }

   return code;

  }