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升級後mysql無法啟動

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升級後mysql無法啟動

好吧，這讓我發瘋。 Ubuntu 20.04.5 LTS（在 WSL 上）

我假設它崩潰了，然後升級了 mysql，現在它無法啟動：

2022-08-31T16:37:29.463168Z 1 [ERROR] [MY-012526] [InnoDB] Upgrade is not supported after a crash or shutdown with innodb_fast_shutdown = 2. This redo log was created with MySQL 8.0.28, and it appears logically non empty. Please follow the instructions at http://dev.mysql.com/doc/refman/8.0/en/upgrading.html
2022-08-31T16:37:29.463211Z 1 [ERROR] [MY-012930] [InnoDB] Plugin initialization aborted with error Generic error.
2022-08-31T16:37:29.842520Z 1 [ERROR] [MY-010334] [Server] Failed to initialize DD Storage Engine
2022-08-31T16:37:29.842925Z 0 [ERROR] [MY-010020] [Server] Data Dictionary initialization failed.
2022-08-31T16:37:29.842966Z 0 [ERROR] [MY-010119] [Server] Aborting

我嘗試刪除重做日誌 ib_logfile0 和 ib_logfile1 然後我得到：

2022-09-03T16:56:05.188621Z 1 [ERROR] [MY-013862] [InnoDB] Neither found #innodb_redo subdirectory, nor ib_logfile* files in ./
2022-09-03T16:56:05.188663Z 1 [ERROR] [MY-012930] [InnoDB] Plugin initialization aborted with error Generic error.
2022-09-03T16:56:05.672331Z 1 [ERROR] [MY-010334] [Server] Failed to initialize DD Storage Engine
2022-09-03T16:56:05.672561Z 0 [ERROR] [MY-010020] [Server] Data Dictionary initialization failed.
2022-09-03T16:56:05.672585Z 0 [ERROR] [MY-010119] [Server] Aborting

也嘗試刪除 ibdata1 並且我得到

2022-09-03T17:20:34.205872Z 1 [ERROR] [MY-012592] [InnoDB] Operating system error number 2 in a file operation.
2022-09-03T17:20:34.205907Z 1 [ERROR] [MY-012593] [InnoDB] The error means the system cannot find the path specified.
2022-09-03T17:20:34.205914Z 1 [ERROR] [MY-012594] [InnoDB] If you are installing InnoDB, remember that you must create directories yourself, InnoDB does not create them.
2022-09-03T17:20:34.205929Z 1 [ERROR] [MY-012646] [InnoDB] File ./ibdata1: 'open' returned OS error 71. Cannot continue operation
2022-09-03T17:20:34.205977Z 1 [ERROR] [MY-012981] [InnoDB] Cannot continue operation.

我想我可以降級到 8.0.28 但肯定有辦法恢復嗎？

我嘗試了各種 innodb_force_recovery 設置，但沒有一個有幫助。

請問我該如何解決這個問題？

謝謝

答案1

我在將 mysql 更新到版本 8.0.30 時遇到了類似的問題，我透過建立 #innodb_redo 資料夾解決了這個問題

cd /var/lib/mysql

mkdir #innodb_redo

chown mysql:mysql #innodb_redo

systemctl start mysql

答案2

但是如果“#”是非法字符，你如何創建#innodb_redo。我收到「Missing Operand」訊息，無法在 Fedora 39 上建立。

vuser@fedora39-ssd-2TB:~$ cd /var/lib/mysql

vuser@fedora39-ssd-2TB:/var/lib/mysql$ sudo mkdir '#innodb_redo'

vuser@fedora39-ssd-2TB:/var/lib/mysql$ sudo chown mysql:mysql' #innodb_redo'

vuser@fedora39-ssd-2TB:/var/lib/mysql$ sudo service mysqld restart
Redirecting to /bin/systemctl restart mysqld.service

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