无法解决getaddrinfo EAI_AGAIN错误

Question

在运行我的NodeJS应用程序20分钟后，我遇到了这个错误，之后一直出现这个错误。它托管在AWS (EC2)上，我搜索getaddrinfo EAI_AGAIN错误，它可能是由DNS问题引起的，但我不知道如何解决它。

WebSocket error: [object Object]
ErrorEvent {
  target:
   WebSocket {
     _events:
      [Object: null prototype] {
        message: [Function: incoming],
        disconnect: [Function],
        close: [Function: close],
        error: [Function] },
     _eventsCount: 4,
     _maxListeners: undefined,
     _binaryType: 'nodebuffer',
     _closeCode: 1006,
     _closeFrameReceived: false,
     _closeFrameSent: false,
     _closeMessage: '',
     _closeTimer: null,
     _extensions: {},
     _protocol: '',
     _readyState: 2,
     _receiver: null,
     _sender: null,
     _socket: null,
     _bufferedAmount: 0,
     _isServer: false,
     _redirects: 0,
     _url: 'wss://stream.binance.com:9443/ws/!bookTicker',
     _req: null },
  type: 'error',
  message:
   'getaddrinfo EAI_AGAIN stream.binance.com stream.binance.com:9443',
  error:
   { Error: getaddrinfo EAI_AGAIN stream.binance.com stream.binance.com:9443
       at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:56:26)
     errno: 'EAI_AGAIN',
     code: 'EAI_AGAIN',
     syscall: 'getaddrinfo',
     hostname: 'stream.binance.com',
     host: 'stream.binance.com',
     port: '9443' } }

Answer 1

对于未来的读者来说，问题是由于Binance的web套接字服务器需要在10分钟内响应ping帧，否则连接将被断开，所以我得到1006错误，我用这样的乒乓框架修复了这个问题：ws.pong();，否则您将得到1008错误代码。

示例：

const ws = new WebSocket('wss://stream.binance.com:9443/ws/!bookTicker');
ws.onopen = function(message) {
    console.log("Connected:   ");
    ws.pong();
}
ws.on("ping", function(message) {
    ws.pong();
});