javascript - node.js 错误日志包含更多信息

Question

我正在这样启动我的 node.js 服务器:

sudo NODE_ENV=production forever start -o out.log -e err.log server.js

有时我会在错误日志中收到错误。

但我得到的是这样的:

Cannot read property 'length' of undefined
    at eval at <anonymous> (/home/ubuntu/www/node_modules/jade/lib/jade.js:161:8)
    at anonymous (eval at <anonymous> (/home/ubuntu/www/node_modules/jade/lib/jade.js:161:8))
    at Object.<anonymous> (/home/ubuntu/www/node_modules/jade/lib/jade.js:166:12)
    at ServerResponse._render (/home/ubuntu/www/node_modules/express/lib/view.js:422:21)
    at ServerResponse.render (/home/ubuntu/www/node_modules/express/lib/view.js:315:17)
    at callbacks (/home/ubuntu/www/node_modules/express/lib/router/index.js:272:11)
    at Promise.<anonymous> (/home/ubuntu/www/helper/auth.js:118:11)
    at Promise.<anonymous> (/home/ubuntu/www/node_modules/mongoose/lib/promise.js:120:8)

如何让错误日志显示更多信息，例如错误发生的日期时间？

Answer 1

像这样使用 'uncaughtException' 事件:

process.on('uncaughtException', function (err) {
  console.log('Caught exception: ' + err);
});

setTimeout(function () {
  console.log('This will still run.');
}, 500);

// Intentionally cause an exception, but don't catch it.
nonexistentFunc();
console.log('This will not run.');

您可以在回调中记录一个日期以及您想要注销的任何其他内容。

更多关于这里的过程: http://nodejs.org/docs/v0.4.12/api/process.html#event_uncaughtException_