NodeJs中, TCP的socket如何彻底的断开链接?

开发使用thrift作rpc通信

thrift的源码大概是这样:

exports.createSSLConnection = function(host, port, options) {
  var stream = tls.connect(port, host, options);
  var connection = new Connection(stream, options);
  connection.host = host;
  connection.port = port;

  return connection;
};

tls类又继承与Net类.

一个Socket, 打开一个文件...

查看进程打开的文件数: ls /proc/{pid}/fd | wc -l

数量稳定的逐步升高.

经过排查后, 发现是链接的RPC没有断开

已经手动调用了: .end: https://nodejs.org/dist/latest-v6.x/docs/api/net.html#net_socket_end_data_encoding .destroy: https://nodejs.org/dist/latest-v6.x/docs/api/net.html#net_socket_destroy_exception

求解?