@Override
  public Admin getAdmin() throws IOException {
    Pair<THBaseService.Client, TTransport> client = clientBuilder.getClient();
    return new ThriftAdmin(client.getFirst(), client.getSecond(), conf);
  }
Get a ThriftAdmin, ThriftAdmin is NOT thread safe
@return a ThriftAdmin
@throws IOException IOException
hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift2/client/ThriftConnection.java