递归 process.nextTick 警告

Question

作为我的应用程序的一部分，我有以下代码行：

process.nextTick(function() {
  // pre-populate cache with all users
  console.log('scanning users table in order to pre-populate cache');
  tables.users.scan(function(err, users) {
    if (err) {
      console.error('unable to scan users database in order to pre-populate cache');
      return;
    }

    console.log('found %d users in database', users.length);
  });
});

在 ubuntu 中运行应用程序给了我

(node) warning: Recursive process.nextTick detected. This will break in the next version of node. Please use setImmediate for recursive deferral.

RangeError: Maximum call stack size exceeded

在 OSX 上运行运行良好，完全没有警告。

两者都运行相同的节点版本v0.10.24。

删除这段代码可以解决问题。我想弄清楚这里发生了什么。

尝试运行带有--trace-deprecation 标志的节点

Trace: (node) warning: Recursive process.nextTick detected. This will break in the next version of node. Please use setImmediate for recursive deferral.
    at maxTickWarn (node.js:377:17)
    at process.nextTick (node.js:480:9)
    at onwrite (_stream_writable.js:260:15)
    at WritableState.onwrite (_stream_writable.js:97:5)
    at WriteStream.Socket._write (net.js:651:5)
    at doWrite (_stream_writable.js:221:10)
    at writeOrBuffer (_stream_writable.js:211:5)
    at WriteStream.Writable.write (_stream_writable.js:180:11)
    at WriteStream.Socket.write (net.js:613:40)
    at Console.warn (console.js:61:16)
    at Console.trace (console.js:95:8)
    at maxTickWarn (node.js:377:17)

使用--throw-deprecation 运行会得到

Error: (node) warning: Recursive process.nextTick detected. This will break in the next version of node. Please use setImmediate for recursive deferral.
    at maxTickWarn (node.js:375:15)
    at process.nextTick (node.js:480:9)
    at Cursor.each (/var/www/node_modules/mongojs/node_modules/mongodb/lib/mongodb/cursor.js:184:13)
    at /var/www/node_modules/mongojs/node_modules/mongodb/lib/mongodb/cursor.js:191:16
    at Cursor.nextObject (/var/www/node_modules/mongojs/node_modules/mongodb/lib/mongodb/cursor.js:540:5)
    at /var/www/node_modules/mongojs/node_modules/mongodb/lib/mongodb/cursor.js:187:12
    at process._tickCallback (node.js:415:13)

非常感谢任何帮助。

10 倍

Answer 1

原来问题出在我在应用程序中使用的模块之一 - mongojs。该问题在模块的更高版本中得到解决，我只需要更新我的package.json。

Jamis Charles 关于使用node --throw-deprecation app.js（或--trace-deprecation）运行我的应用程序的评论向我展示了导致我进入罪魁祸首模块的错误的堆栈跟踪。

我仍然不确定为什么问题出现在 Ubuntu 而不是我的 MBA...