如果您要索引一堆数据，则Flashlight应用程序将要求ES动态索引每个对象，而没有任何资源访问限制。您必须使用信号量来控制/限制对该共享资源的访问。

安装信号量库

npm i --save semaphore

编辑PathMonitor.js文件，并将对ES资源的访问限制为1

PathMonitor.prototype = {
    _init: function () {
        this.sem = require('semaphore')(1);
        this.addMonitor = this.ref.on('child_added', this._process.bind(this, this._childAdded));
        this.changeMonitor = this.ref.on('child_changed', this._process.bind(this, this._childChanged));
        this.removeMonitor = this.ref.on('child_removed', this._process.bind(this, this._childRemoved));
    },
    ...
    _index: function (key, data, callback) {
        var that = this;
        that.sem.take(function () {
            that.esc.index({
                index: that.index,
                type : that.type,
                id   : key,
                body : data
            }, function (error, response) {
                that.sem.leave();
                if (callback) {
                    callback(error, response);
                }
            }.bind(that));
        });
    },
    ...
}

对于付费计划，可能不需要这样做。