我正在使用Node和Cheerio构建Web抓取工具，对于某个网站，我遇到以下错误（它仅在该网站上发生，没有其他我尝试抓取的错误。

每次都在不同的位置发生，因此有时url x是引发错误，有时url x是，并且完全是另一个URL：

    Error!: Error: socket hang up using [insert random URL, it's different every time]

Error: socket hang up
    at createHangUpError (http.js:1445:15)
    at Socket.socketOnEnd [as onend] (http.js:1541:23)
    at Socket.g (events.js:175:14)
    at Socket.EventEmitter.emit (events.js:117:20)
    at _stream_readable.js:910:16
    at process._tickCallback (node.js:415:13)

调试起来非常棘手，我真的不知道从哪里开始。首先，什么是套接字挂起错误？是404错误还是类似错误？还是仅表示服务器拒绝连接？

我在任何地方都找不到这种解释！

编辑：这是（有时）返回错误的代码示例：

function scrapeNexts(url, oncomplete) {
    request(url, function(err, resp, body) {

        if (err) {
            console.log("Uh-oh, ScrapeNexts Error!: " + err + " using " + url);
            errors.nexts.push(url);
        }
        $ = cheerio.load(body);
        // do stuff with the '$' cheerio content here
    });
}

There is no direct call to close the connection, but I'm using Node Request which (as far as I can tell) uses http.get so this is not required, correct me if I'm wrong!

EDIT 2: Here's an actual, in-use bit of code that is causing errors. prodURL and other variables are mostly jquery selectors that are defined earlier. This uses the async library for Node.

function scrapeNexts(url, oncomplete) {
    request(url, function (err, resp, body) {

        if (err) {
            console.log("Uh-oh, ScrapeNexts Error!: " + err + " using " + url);
            errors.nexts.push(url);
        }
        async.series([
                function (callback) {
                    $ = cheerio.load(body);
                    callback();
                },
                function (callback) {
                    $(prodURL).each(function () {
                        var theHref = $(this).attr('href');
                        urls.push(baseURL + theHref);
                    });
                    var next = $(next_select).first().attr('href');
                    oncomplete(next);
                }
            ]);
    });
}