一次window下mysql无法启动问题的解决

Posted 2021-03-09 ubeing

mysql使用了有一阵子了，zip包方式安装的版本是Server version: 8.0.16 MySQL Community Server - GPL
现在的问题如下：
1.mysql -V 登录等mysql -u root -p
错误代码：ERROR 2003 (HY000): Can‘t connect to MySQL server on ‘localhost‘ (10061)

2.是mysql没启动，记得都是自启动的...

C:WINDOWSsystem32>net start Mysql

MySQL 服务正在启动 ..

MySQL 服务无法启动。

服务没有报告任何错误。

请键入 NET HELPMSG 3534 以获得更多的帮助。   启动失败
3.services.msc在系统服务了打开

4.看了网上的方法

C:WINDOWSsystem32>mysqld --install

The service already exists!

The current server installed: F:javamysqlmysql-8.0.16-winx64mysql-8.0.16-winx64inmysqld MySQL

到这里表示数据库确实安装了，系统检查到了，同时有检查环境变量没问题
5.初始化数据库，报错因为之前用过，已经有data目录了。（这一步同上，等于无用功）

C:WINDOWSsystem32>mysqld --initialize --user=mysql --console 
2020-02-17T08:18:41.874659Z 0 [System] [MY-013169] [Server] F:javamysqlmysql-8.0.16-winx64mysql-8.0.16-winx64inmysqld.exe (mysqld 8.0.16) initializing of server in progress as process 18104 
2020-02-17T08:18:41.878318Z 0 [ERROR] [MY-010457] [Server] --initialize specified but the data directory has files in it. Aborting. 
2020-02-17T08:18:41.878347Z 0 [ERROR] [MY-013236] [Server] Newly created data directory F:javamysqlmysql-8.0.16-winx64mysql-8.0.16-winx64data is unusable. You can safely remove it. 
2020-02-17T08:18:41.890111Z 0 [ERROR] [MY-010119] [Server] Aborting 
2020-02-17T08:18:41.890384Z 0 [System] [MY-010910] [Server] F:javamysqlmysql-8.0.16-winx64mysql-8.0.16-winx64inmysqld.exe: Shutdown complete (mysqld 8.0.16) MySQL Community Server - GPL.

6.这部找到问题所在，解决问题 mysqld --console，打印出mysql错误。这里是说数据存储引擎的文件不可写入，data目录初始化失败（这是后来的错误，已经可以使用了）

C:Usersyb150>mysqld --console 2020-02-17T10:37:50.515556Z 0 [System] [MY-010116] [Server] F:javamysqlmysql-8.0.16-winx64mysql-8.0.16-winx64inmysqld.exe (mysqld 8.0.16) starting as process 17296 
2020-02-17T10:37:50.540424Z 1 [ERROR] [MY-012271] [InnoDB] The innodb_system data file ‘ibdata1‘ must be writable 
2020-02-17T10:37:50.540450Z 1 [ERROR] [MY-012278] [InnoDB] The innodb_system data file ‘ibdata1‘ must be writable 
2020-02-17T10:37:50.540850Z 1 [ERROR] [MY-010334] [Server] Failed to initialize DD Storage Engine 
2020-02-17T10:37:50.541283Z 0 [ERROR] [MY-010020] [Server] Data Dictionary initialization failed. 
2020-02-17T10:37:50.558062Z 0 [ERROR] [MY-010119] [Server] Aborting 
2020-02-17T10:37:50.561204Z 0 [System] [MY-010910] [Server] F:javamysqlmysql-8.0.16-winx64mysql-8.0.16-winx64inmysqld.exe: Shutdown complete (mysqld 8.0.16) MySQL Community Server - GPL

当时错误提示是，无法启动数据库已关闭 ——>无法找到对应当binlog.000032等几个文件，这是我想起来之前删除了几个外部binlog文件，在回收站找回后，重新启动成功

mysqld: File ‘./binlog.000032‘ not found (Errcode: 2 - No such file or directory)
2018-08-17T06:58:33.937608Z 0 [ERROR] Failed to open log (file ‘./binlog.000032‘, errno 2)
2018-08-17T06:58:33.937619Z 0 [ERROR] Could not open log file
2018-08-17T06:58:33.937627Z 0 [ERROR] Can‘t init tc log
2018-08-17T06:58:33.937633Z 0 [ERROR] Aborting

7.如果没有找回这几个binlog文件，可以手动创建尝试（猜的）。。还是不行的话，据网上其他人说，可以把my.ini文件中binlog配置注释掉。binlog目录，格式两行代码。不考虑丢数据的情况，可以使用下面的方法启动数据库：将binlog.index 内容清空，启动数据库，这是数据库会重置日志文件，从01开始。

#设置日志路径，注意路经需要mysql用户有权限写

#log-bin=binlog

#设置日志格式

#binlog_format = mixed      注释了