code: protected void traceJobStart(String jobXMLName, Properties jobParameters) {
  
          if (logger.isLoggable(Level.FINE)) {
              StringWriter jobParameterWriter = new StringWriter();
              if (jobParameters != null) {
                  try {
                      jobParameters.store(jobParameterWriter, "Job parameters on start: ");
                  } catch (IOException e) {
                      jobParameterWriter.write("Job parameters on start: not printable");
                  }
              } else {
                  jobParameterWriter.write("Job parameters on start = null");
              }
  
              logger.fine("Starting job: jobXMLName = " + jobXMLName + "\n" + jobParameterWriter.toString());
          }
      }
docs: Trace job submission..