public void close() {
    if (this.scanner != null) {
      this.scanner.close();
    }
    try {
      this.htable.close();
    } catch (IOException ioe) {
      LOG.warn("Error closing table", ioe);
    }
  }
@param rowFilter the {@link Filter} to be used.
hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/TableRecordReaderImpl.java