Question

我发生了一个非常奇怪的错误。我在Mac OS X Sierra上运行Node.js版本8.0.0。

我创建了一个非常简单的http服务器，在本例中8秒后基本上会向任何请求返回'ok'。

然后我使用'request'包每隔9秒向我的http服务器发出一个请求，并使用参数'forever'来保持http会话的活动。

两个中的一个请求完全正常，而另外一个请求返回“socket hang up”错误。

以下是重现此问题的非常简单的代码：

const http = require('http');
const request = require('request');
const port = 3000;

const server = http.createServer((req, res) => {
  console.log('request');
  setTimeout(() => {
    res.end('ok');
  }, 8000);
});
server.listen(port);

setInterval(() => {
  request(`http://localhost:${port}/`, {forever: true}, (error, response, body) => {
    if (error) return console.log('error', error);
    console.log('done', body);
  });
}, 9000);

当我运行此代码时，我在Macbook Pro上获得以下输出：

request
done ok
request
error { Error: socket hang up
    at createHangUpError (_http_client.js:343:15)
    at Socket.socketOnEnd (_http_client.js:435:23)
    at emitNone (events.js:110:20)
    at Socket.emit (events.js:207:7)
    at endReadableNT (_stream_readable.js:1045:12)
    at _combinedTickCallback (internal/process/next_tick.js:102:11)
    at process._tickCallback (internal/process/next_tick.js:161:9) code: 'ECONNRESET' }
request
done ok
request
error { Error: socket hang up
    at createHangUpError (_http_client.js:343:15)
    at Socket.socketOnEnd (_http_client.js:435:23)
    at emitNone (events.js:110:20)
    at Socket.emit (events.js:207:7)
    at endReadableNT (_stream_readable.js:1045:12)
    at _combinedTickCallback (internal/process/next_tick.js:102:11)
    at process._tickCallback (internal/process/next_tick.js:161:9) code: 'ECONNRESET' }
request
done ok
request
error { Error: socket hang up
    at createHangUpError (_http_client.js:343:15)
    at Socket.socketOnEnd (_http_client.js:435:23)
    at emitNone (events.js:110:20)
    at Socket.emit (events.js:207:7)
    at endReadableNT (_stream_readable.js:1045:12)
    at _combinedTickCallback (internal/process/next_tick.js:102:11)
    at process._tickCallback (internal/process/next_tick.js:161:9) code: 'ECONNRESET' }

所以每次其他请求都会出现'socket hang up'错误。

似乎这个错误似乎没有出现在Ubuntu VPS上。

关于为什么会出现此问题的任何想法？

Node.js'socket挂断'并保持活着状态

0 个答案: