记录一次学习node.js犯的低级错误 这里遇到一个这样的问题 express连接mongoose时报错(node:7584) UnhandledPromiseRejectionWarning: MongooseTimeoutError: Server selection timed out after 30000 ms 连接数据库的代码 const mongoose=require('mongoose') mongoose.connect('mongodb://localhost:27017/…
今天使用mongo-java-drive写连接mongo的客户端,着实被上面那个错坑了一把.回顾一下解决过程: 报错: com.mongodb.MongoTimeoutException: Timed out after ms , type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketWriteException: Exception sending message}, caused by {javax.net.ssl…
本地连接mongo报错,错误代码为: Caused by: com.mongodb.MongoTimeoutException: Timed out after 30000 ms while waiting for a server that matches WritableServerSelector. Client view of cluster state is {type=UNKNOWN, servers= ............................... 系统: cent…
http://stackoverflow.com/questions/19661811/unable-to-download-msnodesql-0-2-1-v0-10-x64-msi 首先要满足以下安装环境: Node.js - use the latest version if possible, but it has been tested on node 0.6.10 and later node-gyp - latest version installed globally (npm…
Client - 客户端,一般指浏览器,浏览器可以通过 HTTP 协议向服务器请求数据. Server - 服务端,一般指 Web 服务器,可以接收客户端请求,并向客户端发送响应数据. Business - 业务层, 通过 Web 服务器处理应用程序,如与数据库交互,逻辑运算,调用外部程序等. Data - 数据层,一般由数据库组成.…