Question

我有一个Node.js应用程序来进行一些简单的处理，但是，每次出现错误时，服务器都会崩溃。

2011-12-19T19:27:49+00:00 app[web.1]: node.js:134
2011-12-19T19:27:49+00:00 app[web.1]:         throw e; // process.nextTick error, or 'error' event on first tick
2011-12-19T19:27:49+00:00 app[web.1]:         ^
2011-12-19T19:27:49+00:00 app[web.1]: TypeError: Object { customer_id: 4eef8ddb74019b9d4f00001d,
2011-12-19T19:27:49+00:00 app[web.1]:   date: Mon, 19 Dec 2011 19:27:36 GMT,
2011-12-19T19:27:49+00:00 app[web.1]:   callsid: '123',
2011-12-19T19:27:49+00:00 app[web.1]:   _id: 4eef902887e9770100000008 } has no method 'save'
2011-12-19T19:27:49+00:00 app[web.1]:     at Promise.<anonymous> (/app/src/call.js:137:24)
2011-12-19T19:27:49+00:00 app[web.1]:     at Promise.<anonymous> (/app/node_modules/mongoose/lib/promise.js:120:8)
2011-12-19T19:27:49+00:00 app[web.1]:     at Promise.<anonymous> (events.js:64:17)
2011-12-19T19:27:49+00:00 app[web.1]:     at Promise.emit (/app/node_modules/mongoose/lib/promise.js:59:38)
2011-12-19T19:27:49+00:00 app[web.1]:     at Promise.complete (/app/node_modules/mongoose/lib/promise.js:70:20)
2011-12-19T19:27:49+00:00 app[web.1]:     at /app/node_modules/mongoose/lib/query.js:738:28
2011-12-19T19:27:49+00:00 app[web.1]:     at model.init (/app/node_modules/mongoose/lib/model.js:181:36)
2011-12-19T19:27:49+00:00 app[web.1]:     at cb (/app/node_modules/mongoose/lib/query.js:736:14)
2011-12-19T19:27:49+00:00 app[web.1]:     at Array.<anonymous> (/app/node_modules/mongoose/lib/utils.js:394:16)
2011-12-19T19:27:49+00:00 app[web.1]:     at model.<anonymous> (/app/node_modules/mongoose/lib/document.js:181:5)

如何防止此类错误？例如，当我调用一个不存在的变量时，服务器崩溃了。我理解错误，但有时我只注意到部署时的错误，服务器崩溃。

Answer 1

您可以通过使用process.on('uncaughtException', callback)捕获'uncaughtException'来确保您的脚本不会停止，如下所示：

process.on('uncaughtException', function (exception) {
  // handle or ignore error
  console.log(exception);
});

setInterval(function() {
  console.log('tick, even after error');
}, 1000);

a += 1;

Node.js：任何错误都会导致Heroku服务器崩溃

1 个答案: