public static Schema getSchemaFromFS(String schemaFSUrl, Configuration conf)
      throws SerDeException {
    FSDataInputStream in = null;
    FileSystem fs = null;
    try {
      fs = FileSystem.get(new URI(schemaFSUrl), conf);
      in = fs.open(new Path(schemaFSUrl));
      Schema s = Schema.parse(in);
      return s;
    } catch (URISyntaxException e) {
      throw new SerDeException("Failure reading schema from filesystem", e);
    } catch (IOException e) {
      throw new SerDeException("Failure reading schema from filesystem", e);
    } finally {
      IOUtils.closeQuietly(in);
    }
  }
Read the schema from the given hdfs url for the schema
hbase-handler/src/java/org/apache/hadoop/hive/hbase/HBaseSerDeHelper.java