code: public String getRawJobHistory(QualifiedJobId jobId) throws IOException {
      String historyData = null;
      byte[] rowKey = idConv.toBytes(jobId);
      Get get = new Get(rowKey);
      get.addColumn(Constants.RAW_FAM_BYTES, Constants.JOBHISTORY_COL_BYTES);
      Table rawTable = null;
      try {
        rawTable = hbaseConnection
            .getTable(TableName.valueOf(Constants.HISTORY_RAW_TABLE));
        Result result = rawTable.get(get);
        if (result != null && !result.isEmpty()) {
          historyData = Bytes.toString(result.getValue(Constants.RAW_FAM_BYTES,
              Constants.JOBHISTORY_COL_BYTES));
        }
      } finally {
        if (rawTable != null) {
          rawTable.close();
        }
      }
  
      return historyData;
    }
docs: Returns the raw job history file stored for the given cluster and job ID.
  @param jobId the cluster and job ID to look up
  @return the stored job history file contents or {@code null} if no
  corresponding record was found
  @throws IOException