我正在使用Node.js + MongoDB开发一个应用程序。有时,就在向服务器发出一些AJAX请求之前,我会收到这样的错误:
net.js:434
var writeReq = this._handle.write(data);
^
TypeError: Cannot call method 'write' of null
at Socket._write (net.js:434:31)
at Socket.write (net.js:426:15)
at [object Object].
我有一个mysql服务器在本地运行,我可以使用
mysql -h localhost -u root
它不需要密码。但是,当我试图通过jdbcurl= "jdbc:mysql://localhost:3306/mysql",user =root连接相同的属性时,我得到了这个奇怪的异常
he last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at java.base/jdk.