public static WALTailingReader createTailingReader(FileSystem fs, Path path, Configuration conf,
    long startPosition) throws IOException {
    ProtobufWALTailingReader reader = new ProtobufWALTailingReader();
    reader.init(fs, path, conf, startPosition);
    return reader;
  }
Create a tailing reader for the given path. Mainly used in replication.
hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALFactory.java