mamp mysql 无法启动

Question

我的 mysql 服务器有问题。当我启动 MAMP 时，Mysql 服务器将无法启动。我试图改变端口，但它没有帮助。我检查了错误日志，发现：

161010 09:21:07 mysqld_safe Starting mysqld daemon with databases from /Applications/MAMP/db/mysql56
2016-10-10 09:21:07 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2016-10-10 09:21:07 0 [Note] /Applications/MAMP/Library/bin/mysqld (mysqld 5.6.28) starting as process 6633 ...
2016-10-10 09:21:07 6633 [Warning] Setting lower_case_table_names=2 because file system for /Applications/MAMP/db/mysql56/ is case insensitive
2016-10-10 09:21:07 6633 [Note] Plugin 'FEDERATED' is disabled.
/Applications/MAMP/Library/bin/mysqld: Can't find file: './mysql/plugin.frm' (errno: 13 - Permission denied)
2016-10-10 09:21:07 6633 [ERROR] Can't open the mysql.plugin table.    Please run mysql_upgrade to create it.
2016-10-10 09:21:07 6633 [Note] InnoDB: Using atomics to ref count buffer pool pages
2016-10-10 09:21:07 6633 [Note] InnoDB: The InnoDB memory heap is disabled
2016-10-10 09:21:07 6633 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2016-10-10 09:21:07 6633 [Note] InnoDB: Memory barrier is not used
2016-10-10 09:21:07 6633 [Note] InnoDB: Compressed tables use zlib 1.2.8
2016-10-10 09:21:07 6633 [Note] InnoDB: Using CPU crc32 instructions
2016-10-10 09:21:07 6633 [Note] InnoDB: Initializing buffer pool, size = 128.0M
2016-10-10 09:21:07 6633 [Note] InnoDB: Completed initialization of buffer pool
2016-10-10 09:21:07 6633 [Note] InnoDB: Highest supported file format is Barracuda.
2016-10-10 09:21:07 6633 [Note] InnoDB: 128 rollback segment(s) are active.
2016-10-10 09:21:07 6633 [Note] InnoDB: Waiting for purge to start
2016-10-10 09:21:07 6633 [Note] InnoDB: 5.6.28 started; log sequence number 1600617
2016-10-10 09:21:07 6633 [Note] RSA private key file not found: /Applications/MAMP/db/mysql56//private_key.pem. Some authentication plugins will not work.
2016-10-10 09:21:07 6633 [Note] RSA public key file not found: /Applications/MAMP/db/mysql56//public_key.pem. Some authentication plugins will not work.
2016-10-10 09:21:07 6633 [Note] Server hostname (bind-address): '*'; port: 3308
2016-10-10 09:21:07 6633 [Note] IPv6 is available.
2016-10-10 09:21:07 6633 [Note]   - '::' resolves to '::';
2016-10-10 09:21:07 6633 [Note] Server socket created on IP: '::'.
2016-10-10 09:21:07 6633 [ERROR] /Applications/MAMP/Library/bin/mysqld:  Can't find file: './mysql/user.frm' (errno: 13 - Permission denied)
2016-10-10 09:21:07 6633 [ERROR] Fatal error: Can't open and lock privilege tables: Can't find file: './mysql/user.frm' (errno: 13 - Permission denied)
161010 09:21:07 mysqld_safe mysqld from pid file   /Applications/MAMP/tmp/mysql/mysql.pid ended

希望有人能帮我解决这个问题。

Answer 1

重命名 MAMP/db/mysql56 文件夹中的所有文件 ib_logfileN（N 是数字）。 mv tmp_ib_logfileN 然后重新启动 MAMP。 喜欢

Answer 2

我不知道这是否会是您的问题，但我尝试使用 killall -9 mysqld 杀死 mysqld 并尝试在 Activity Monitor 中查找正在运行的 mysqld，但它不存在。

最终我解决了问题：在我遇到问题之前发生的事情是 mysqldump 已被中断。那已经破坏了一个表空间。所以我退出并重新启动了 MAMP PRO（服务器未设置为自动启动）。然后使用 MAMPs 文件 > 编辑模板更改 my.cnf。并添加了innodb_force_recovery = 1 行。之后服务器开始正常。我在修复后注释掉了那行。