log.error("Failed to run job", t); return null;
throw new PerfException("Failed to invoke", t);
   protected JobResult sendRequestToSlave(String slaveURL, ServerRequest request)   {      try      {         InvokerLocator locator = new InvokerLocator(slaveURL);         Client client = new Client(locator, "perftest");         Object res = client.invoke(request);                                    return (JobResult)res;      }      catch (Throwable t)      {         log.error("Failed to run job", t);         return null;      }   }