docs: protected Connection getConnection(InetSocketAddress address) {
          Connection conn = null;
          try {
              // 获取连接
              conn = pool.borrowObject(address);
          } catch (FdfsException e) {
              throw e;
          } catch (Exception e) {
              LOGGER.error("Unable to borrow buffer from pool", e);
              throw new RuntimeException("Unable to borrow buffer from pool", e);
          }
          return conn;
      }