mysql - Mamp 不会启动 mysql 服务器 (mac)

Question

我启动并运行了 mamp (wordpress)，没有遇到任何问题。然后突然服务器宕机了，再也没有启动过。他们是关于这个话题的一些其他话题，但我还没弄明白。我已经确认没有 mysql 进程在运行....这是我的 mysql_error_log :

161201 01:04:22 mysqld_safe Starting mysqld daemon with databases from /Applications/MAMP/db/mysql56
2016-12-01 01:04:23 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2016-12-01 01:04:23 0 [Note] /Applications/MAMP/Library/bin/mysqld (mysqld 5.6.33) starting as process 49478 ...
2016-12-01 01:04:23 49478 [Warning] Setting lower_case_table_names=2 because file system for /Applications/MAMP/db/mysql56/ is case insensitive
2016-12-01 01:04:23 49478 [Note] Plugin 'FEDERATED' is disabled.
2016-12-01 01:04:23 49478 [Note] InnoDB: Using atomics to ref count buffer pool pages
2016-12-01 01:04:23 49478 [Note] InnoDB: The InnoDB memory heap is disabled
2016-12-01 01:04:23 49478 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2016-12-01 01:04:23 49478 [Note] InnoDB: Memory barrier is not used
2016-12-01 01:04:23 49478 [Note] InnoDB: Compressed tables use zlib 1.2.8
2016-12-01 01:04:23 49478 [Note] InnoDB: Using CPU crc32 instructions
2016-12-01 01:04:23 49478 [Note] InnoDB: Initializing buffer pool, size = 128.0M
2016-12-01 01:04:23 49478 [Note] InnoDB: Completed initialization of buffer pool
2016-12-01 01:04:23 49478 [Note] InnoDB: Highest supported file format is Barracuda.
2016-12-01 01:04:23 49478 [Note] InnoDB: The log sequence numbers 0 and 0 in ibdata files do not match the log sequence number 9969064 in the ib_logfiles!
2016-12-01 01:04:23 49478 [Note] InnoDB: Database was not shutdown normally!
2016-12-01 01:04:23 49478 [Note] InnoDB: Starting crash recovery.
2016-12-01 01:04:23 49478 [Note] InnoDB: Reading tablespace information from the .ibd files...
2016-12-01 01:04:23 49478 [ERROR] InnoDB: Attempted to open a previously opened tablespace. Previous tablespace mysql/slave_worker_info uses space ID: 5 at filepath: ./mysql/slave_worker_info.ibd. Cannot open tablespace wordpress/wp_term_taxonomy which uses space ID: 5 at filepath: ./wordpress/wp_term_taxonomy.ibd
2016-12-01 01:04:23 7fffc52a43c0  InnoDB: Operating system error number 2 in a file operation.
InnoDB: The error means the system cannot find the path specified.
InnoDB: If you are installing InnoDB, remember that you must create
InnoDB: directories yourself, InnoDB does not create them.
InnoDB: Error: could not open single-table tablespace file ./wordpress/wp_term_taxonomy.ibd
InnoDB: We do not continue the crash recovery, because the table may become
InnoDB: corrupt if we cannot apply the log records in the InnoDB log to it.
InnoDB: To fix the problem and start mysqld:
InnoDB: 1) If there is a permission problem in the file and mysqld cannot
InnoDB: open the file, you should modify the permissions.
InnoDB: 2) If the table is not needed, or you can restore it from a backup,
InnoDB: then you can remove the .ibd file, and InnoDB will do a normal
InnoDB: crash recovery and ignore that table.
InnoDB: 3) If the file system or the disk is broken, and you cannot remove
InnoDB: the .ibd file, you can set innodb_force_recovery > 0 in my.cnf
InnoDB: and force InnoDB to continue crash recovery here.
161201 01:04:23 mysqld_safe mysqld from pid file /Applications/MAMP/tmp/mysql/mysql.pid ended

Answer 1

这意味着您的一张表已损坏。奇怪的是，这种情况经常发生在机器崩溃时。我就是这样修复它的:

1. 打开 my.cnf(在 MAMP > 文件 > 编辑模板 > MySQL 中)
2. 添加行:innodb_force_recovery = 1
3. 保存并启动服务器

该表可能仍会损坏，但 mysql 应该会启动。这意味着您可能必须更换表格:wp_term_taxonomy

注意:如果 innodb_force_recovery = 1 不起作用，请尝试增加数字:innodb_force_recovery = 2 (等等)但要小心行事。这是 MySQL 对此设置的警告: https://dev.mysql.com/doc/refman/5.5/en/forcing-innodb-recovery.html