Azure Cosmos DB：TypeError：无法读取未定义的属性'electionId'
我用mongodb后端使用Azure Cosmos DB。 我一直在收到这个错误。
Exception has occurred: Error TypeError: Cannot read property 'electionId' of undefined at ReplSetState.update (c:\dev\3dshoppers.backend\node_modules\mongodb-core\lib\topologies\replset_state.js:371:70) at Server._handleEvent (c:\dev\3dshoppers.backend\node_modules\mongodb-core\lib\topologies\replset.js:421:45) at Server.g (events.js:291:16) at emitOne (events.js:96:13) at Server.emit (events.js:188:7) at c:\dev\3dshoppers.backend\node_modules\mongodb-core\lib\topologies\server.js:297:14 at c:\dev\3dshoppers.backend\node_modules\mongodb-core\lib\connection\pool.js:457:18 at _combinedTickCallback (internal/process/next_tick.js:73:7) at process._tickCallback (internal/process/next_tick.js:104:9) 我正在使用mongodb@2.2.19。 如果我更新npm包到最新版本，我得到不同的错误（'MongoError：池被毁坏'）。 我觉得Cosmos DB有一些问题……
这在replset_state.js的这一行发生。
var currentElectionId = self.set[self.primary.name.toLowerCase()].electionId;
编辑：我能够重现以下两个文件的错误。
server.js
// packages const express = require('express'); const http = require('http'); const MongoClient = require('mongodb').MongoClient; // express app const app = express(); // mongodb const mongoConnectionString = process.env.MONGODB_CONNECTION_STRING; const mongoOptions = { connectTimeoutMS: 0 } var mongoDB; var myCollection; MongoClient.connect(mongoConnectionString, (err, db) => { if (err) throw err; mongoDB = db.db('testdb'); mongoDB.collection('cars', (err, collection) => { if (err) throw err; myCollection = collection; }); http.createServer(app).listen(process.env.PORT || 3000); });
的package.json
{ "name": "mongodb-debug", "description": "mongodb debugging", "version": "0.0.1", "private": true, "license": "MIT", "author": "me", "engines": { "node": "6.9.3" }, "dependencies": { "express": "4.15.2", "mongodb": "2.2.19" }, "scripts": { "start": "node server.js", "test": "mocha" } }
如果您不使用副本集并只有一个Cosmos数据库实例，则可以通过从连接string中除去&replicaSet=globaldb来避免此问题。
类似的问题可以在这里find： MongoError：Pool Destroyed 。
我有完全一样的错误：
Thu May 25 2017 05:17:57 GMT+0000 (Coordinated Universal Time): Application has thrown an uncaught exception and is terminated: TypeError: Cannot read property 'electionId' of undefined at ReplSetState.update (D:\home\site\wwwroot\node_modules\mongoose\node_modules\mongodb-core\lib\topologies\replset_state.js:353:70) at Server.<anonymous> (D:\home\site\wwwroot\node_modules\mongoose\node_modules\mongodb-core\lib\topologies\replset.js:393:45) at Server.g (events.js:291:16) at emitOne (events.js:96:13) at Server.emit (events.js:188:7) at D:\home\site\wwwroot\node_modules\mongoose\node_modules\mongodb-core\lib\topologies\server.js:280:14 at D:\home\site\wwwroot\node_modules\mongoose\node_modules\mongodb-core\lib\connection\pool.js:455:18 at _combinedTickCallback (internal/process/next_tick.js:67:7) at process._tickCallback (internal/process/next_tick.js:98:9) TypeError: Cannot read property 'electionId' of undefined at ReplSetState.update (D:\home\site\wwwroot\node_modules\mongoose\node_modules\mongodb-core\lib\topologies\replset_state.js:353:70) at Server.<anonymous> (D:\home\site\wwwroot\node_modules\mongoose\node_modules\mongodb-core\lib\topologies\replset.js:393:45) at Server.g (events.js:291:16) at emitOne (events.js:96:13) at Server.emit (events.js:188:7) at D:\home\site\wwwroot\node_modules\mongoose\node_modules\mongodb-core\lib\topologies\server.js:280:14 at D:\home\site\wwwroot\node_modules\mongoose\node_modules\mongodb-core\lib\connection\pool.js:455:18 at _combinedTickCallback (internal/process/next_tick.js:67:7) at process._tickCallback (internal/process/next_tick.js:98:9)
也使用我的node-js应用程序的cosmos-db。 连接工作正常，因为我创build的所有集合
hier是package.json和完整的项目
https://github.com/aumanjoa/chronas-community/blob/master/package.json#L48 https://github.com/aumanjoa/chronas-community/