code: public void sendDelayEventsToWaitActivities(String masterRequestId)
              throws DataAccessException, ProcessException {
          TransactionWrapper transaction = null;
          EngineDataAccessDB edao = new EngineDataAccessDB();
          try {
              transaction = edao.startTransaction();
              List<ProcessInstance> procInsts = edao.getProcessInstancesByMasterRequestId(masterRequestId, null);
              for (ProcessInstance pi : procInsts) {
                  List<ActivityInstance> actInsts = edao.getActivityInstancesForProcessInstance(pi.getId());
                  for (ActivityInstance ai : actInsts) {
                      if (ai.getStatusCode()==WorkStatus.STATUS_WAITING.intValue()) {
                          InternalEvent event = InternalEvent.createActivityDelayMessage(ai,
                                  masterRequestId);
                          this.sendInternalEvent(event, edao);
                      }
                  }
              }
          } catch (SQLException e) {
              throw new ProcessException(0, "Failed to send delay event wait activities runtime", e);
          } finally {
              edao.stopTransaction(transaction);
          }
      }
docs: This is for regression tester only.
  @param masterRequestId