@Override
    public float getProgress() throws IOException, InterruptedException {
      // N/A depends on total number of entries, which is unknown
      return 0;
    }
{@link RecordReader} for an {@link WAL} file. Implementation shared with deprecated
HLogInputFormat.
hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/WALInputFormat.java