RPC client not using Codec and CellBlock for puts by default

private boolean isCellBlock() {
    // This is not exact -- the configuration could have changed on us after connection was set up
    // but it will do for now.
    HConnection connection = getConnection();
    if (connection == null) return true; // Default is to do cellblocks.
    Configuration configuration = connection.getConfiguration();
    if (configuration == null) return true;
    String codec = configuration.get(HConstants.RPC_CODEC_CONF_KEY, "");
    return codec != null && codec.length() > 0;
  }

Codec getCodec() {
    // For NO CODEC, "hbase.client.rpc.codec" must be configured with empty string AND
    // "hbase.client.default.rpc.codec" also -- because default is to do cell block encoding.
    String className = conf.get(HConstants.RPC_CODEC_CONF_KEY, getDefaultCodec(this.conf));
    if (className == null || className.length() == 0) return null;
    try {
      return (Codec)Class.forName(className).newInstance();
    } catch (Exception e) {
      throw new RuntimeException("Failed getting codec " + className, e);
    }
  }
.....
public static String getDefaultCodec(final Configuration c) {
    // If "hbase.client.default.rpc.codec" is empty string -- you can't set it to null because
    // Configuration will complain -- then no default codec (and we'll pb everything).  Else
    // default is KeyValueCodec
    return c.get(DEFAULT_CODEC_CLASS, KeyValueCodec.class.getCanonicalName());
  }