相关疑难解决方法(0)

我刚在Homebrew上安装了mysql

brew install mysql

mysql -V

mysql  Ver 8.0.11 for osx10.13 on x86_64 (Homebrew)

从终端它工作,我可以登录到mysql,但从Sequel Pro它说

无法连接到主机127.0.0.1,或请求超时.

确保地址正确并且您具有必要的权限,或尝试增加连接超时(当前为10秒).

MySQL说:无法加载身份验证插件'caching_sha2_password':dlopen(/usr/local/lib/plugin/caching_sha2_password.so,2):找不到图片

无法弄清楚我错过了什么

我试图通过NodeJS文件连接到mySQL,但是我收到以下错误:

{ Error: ER_ACCESS_DENIED_ERROR: Access denied for user 'root'@'localhost' (using password: YES)
    at Handshake.Sequence._packetToError (/home/matthew/Node/mySqlTest/node_modules/mysql/lib/protocol/sequences/Sequence.js:30:14)
    at Handshake.ErrorPacket (/home/matthew/Node/mySqlTest/node_modules/mysql/lib/protocol/sequences/Handshake.js:67:18)
    at Protocol._parsePacket (/home/matthew/Node/mySqlTest/node_modules/mysql/lib/protocol/Protocol.js:197:24)
    at Parser.write (/home/matthew/Node/mySqlTest/node_modules/mysql/lib/protocol/Parser.js:62:12)
    at Protocol.write (/home/matthew/Node/mySqlTest/node_modules/mysql/lib/protocol/Protocol.js:37:16)
    at Socket.ondata (_stream_readable.js:555:20)
    at emitOne (events.js:101:20)
    at Socket.emit (events.js:188:7)
    at readableAddChunk (_stream_readable.js:176:18)
    at Socket.Readable.push (_stream_readable.js:134:10)
    --------------------
    at Protocol._enqueue (/home/matthew/Node/mySqlTest/node_modules/mysql/lib/protocol/Protocol.js:110:26)
    at Protocol.handshake (/home/matthew/Node/mySqlTest/node_modules/mysql/lib/protocol/Protocol.js:42:41)
    at Connection.connect (/home/matthew/Node/mySqlTest/node_modules/mysql/lib/Connection.js:81:18)
    at Connection._implyConnect (/home/matthew/Node/mySqlTest/node_modules/mysql/lib/Connection.js:222:10)
    at Connection.query (/home/matthew/Node/mySqlTest/node_modules/mysql/lib/Connection.js:137:8)
    at Object.<anonymous> (/home/matthew/Node/mySqlTest/index.js:11:12)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
  code: 'ER_ACCESS_DENIED_ERROR',
  errno: 1045,
  sqlState: '28000',
  fatal: …

我已经设置了一个MySQL数据库.当我尝试通过我的Node JS服务器访问它时,我收到错误

"ER_NOT_SUPPORTED_AUTH_MODE:客户端不支持服务器请求的身份验证协议;请考虑升级MariaDB客户端"

这很奇怪,因为我已经卸载了MariaDB并使用Homebrew安装了MySQL.

这是我的连接尝试:

var mysql = require('mysql');

var connection = mysql.createConnection({
  host     : 'localhost',
  user     : 'root',
  password : '********',
  database : 'vod_bill_database'
}); 

有任何想法吗？谢谢

我有一个Node.js程序,它使用root帐户连接到本地MySQL数据库(这不是生产设置).这是创建连接的代码:

const mysql = require('mysql');

const dbConn = mysql.createConnection({
    host: 'localhost',
    port: 3306,
    user: 'root',
    password: 'myRootPassword',
    database: 'decldb'
});

dbConn.connect(err => {
    if (err) throw err;
    console.log('Connected!');
});

它适用于MySQL 5.7,但自从安装MySQL 8.0后,我在启动Node.js应用程序时遇到此错误:

> node .\api-server\main.js
[2018-05-16T13:53:53.153Z] Server launched on port 3000!
C:\Users\me\project\node_server\node_modules\mysql\lib\protocol\Parser.js:80
        throw err; // Rethrow non-MySQL errors
        ^

Error: ER_NOT_SUPPORTED_AUTH_MODE: Client does not support authentication protocol requested by server; consider upgrading MySQL client
    at Handshake.Sequence._packetToError (C:\Users\me\project\node_server\node_modules\mysql\lib\protocol\sequences\Sequence.js:52:14)
    at Handshake.ErrorPacket (C:\Users\me\project\node_server\node_modules\mysql\lib\protocol\sequences\Handshake.js:130:18)
    at Protocol._parsePacket (C:\Users\me\project\node_server\node_modules\mysql\lib\protocol\Protocol.js:279:23)
    at Parser.write (C:\Users\me\project\node_server\node_modules\mysql\lib\protocol\Parser.js:76:12)
    at Protocol.write (C:\Users\me\project\node_server\node_modules\mysql\lib\protocol\Protocol.js:39:16)
    at …

Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Client does not support authentication protocol requested by server; consider upgrading MySQL client
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.base/java.lang.reflect.Constructor.newInstance(Unknown Source)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
    at com.mysql.jdbc.Util.getInstance(Util.java:381)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:984)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3558)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3490)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:919)
    at com.mysql.jdbc.MysqlIO.secureAuth411(MysqlIO.java:3996)
    at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1284)
    at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2137)
    at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:776)
    at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.base/java.lang.reflect.Constructor.newInstance(Unknown Source)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
    at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:352)
    at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:284)
    at java.sql/java.sql.DriverManager.getConnection(Unknown Source)
    at java.sql/java.sql.DriverManager.getConnection(Unknown Source)
    at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriverManager(DriverManagerDataSource.java:154)
    at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriver(DriverManagerDataSource.java:145) …

尝试从微服务内部连接数据库，但无法连接数据库

错误：连接ECONNREFUSED 172.18.0.2:3306

服务/index.js

var http = require('http');

//create a server object:
http.createServer(function (req, res) {
    res.write('Hello World!'); //write a response to the client
    res.end(); //end the response
}).listen(8080); //the server object listens on port 8080

console.log("Listening at 8080");

var mysql = require('mysql');

var con = mysql.createConnection({
    host: "database",
    user: "root",
    password: "password"
});

con.connect(function(err) {
    if (err) throw err;
    console.log("Database Connected!");
});

docker-compose.yml

version: '3'

services:
  database:
    build:
      ./database
    ports:
      - "6603:3306"
    image: "test-mysql"
    container_name: "test-mysql"

  service:
    build:
      ./service …

执行JDBC程序时，连接到数据库时出现以下错误：

Exception in thread "main" 
com.mysql.jdbc.exceptions.MySQLNonTransientConnectionException: Client does 
not support authentication protocol requested by server; consider upgrading 
MySQL client
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:921)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2985)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:885)
at com.mysql.jdbc.MysqlIO.secureAuth411(MysqlIO.java:3421)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1247)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2775)
at com.mysql.jdbc.Connection.<init>(Connection.java:1555)
at 
com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:285)
at java.sql.DriverManager.getConnection(DriverManager.java:664)
at java.sql.DriverManager.getConnection(DriverManager.java:270)
at main.java.MyFirstJdbcProgram.readDataBase(MyFirstJdbcProgram.java:23)
at main.java.Main.main(Main.java:6)

在研究此问题时，我知道以下错误是因为我需要向用户授予特权，所以请按照以下步骤操作

1. mysql -u root -p
2. 然后输入密码

3. 然后我跑了

   GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' IDENTIFIED BY 'mypassword';    
   

   Run Code Online (Sandbox Code Playgroud)

   我也用过

   UPDATE user SET authentication_string=password('mypassword') WHERE user='root';
   

   Run Code Online (Sandbox Code Playgroud)

但是我正在错误以下

错误1064（42000）：您的SQL语法有错误；检查与您的MySQL服务器版本相对应的手册以获取正确的语法，以在第1行的'IDENTIFIED BY'mypassword'附近使用

当我尝试与mysql 8.0连接时，出现此错误。我怎样才能解决这个问题 ？

code: 'ER_NOT_SUPPORTED_AUTH_MODE',
errno: 1251,
sqlMessage: 'Client does not support authentication protocol requested by server; 
consider upgrading MySQL client',
sqlState: '08004',
fatal: true

我的春豆出现以下错误，

创建名称为'employeeRepositoryDAOImple'的bean时出错：通过方法'setSessionFactory'参数0表示的依赖关系未满足；嵌套的异常是org.springframework.beans.factory.BeanCreationException：创建在类路径资源[config.xml]中定义的名称为'sessionFactory'的bean时出错：调用init方法失败；嵌套的异常是org.hibernate.exception.JDBCConnectionException：无法打开JDBC连接以执行DDL

客户端.java

public class Client {
    public static void main(String arg[]) {

        AbstractApplicationContext ctx = new     ClassPathXmlApplicationContext("config.xml");
        EmployeeService employeeService = (EmployeeService) ctx.getBean("empoyeService");

        Employee employee1 = new Employee(100001, "Alex", "Account");
        Employee employee2 = new Employee(100002, "Sam", "HR");

        employeeService.insert(employee1);
        employeeService.insert(employee2);
        System.out.println("Records are successfully added..");
        ctx.close();

    }
}

实体.java

@Entity
public class Employee {
@Id
private int empId;
private String empName;
private String department;
public Employee() {
    super();
}
public Employee(int empId,String empName,String deptName)
{
    super();
    this.empId=empId;
    this.empName=empName;
    this.department=deptName;
}

public int …

在nodejs中使用的mysql问题

const mysql      = require('mysql');
var connection = mysql.createConnection({
  host     : 'localhost',
  user     : 'root',
  password : '123456789',
  database : 'userdata'
});

connection.connect(function(err) {
  if (err) {
    console.error('error connecting: ' + err);
    return;
  }

 console.log('connected as id ' + connection.threadId);
});

错误：ER_NOT_SUPPORTED_AUTH_MODE：客户端不支持服务器请求的身份验证协议。考虑升级MySQL客户端